Mokapu | Images of Old Hawaiʻi

March 9, 2026 by Peter T Young Leave a Comment

Battery French

On February 6, 1901, the US Army artillery corps divided into separate field and coast artillery components by General Order 9, War Department, implementing the Army Reorganization Act.

Artillery districts, each consisting of one or more forts and accompanying mine fields and land defenses, were established to protect the Atlantic and Pacific coasts of the United States and the coasts of Hawai‘i and Puerto Rico. (US Archives)

In January 1905, President Teddy Roosevelt instructed Secretary of War William H Taft to convene the National Coast Defense Board (Taft Board) “to consider and report upon the coast defenses of the United States and the insular possessions (including Hawai‘i.)”

In 1906 the Taft Board recommended a system of Coast Artillery batteries to protect Pearl Harbor and Honolulu. Between 1909-1921, the Hawaiian Coast Artillery Command had its headquarters at Fort Ruger and defenses included artillery regiments stationed around the Island.

The Army mission in Hawai‘i was defined as “the defense of Pearl Harbor Naval Base against damage from naval or aerial bombardment or by enemy sympathizers and attack by enemy expeditionary force or forces, supported or unsupported by an enemy fleet or fleets.”

In 1918, President Woodrow Wilson designated 322 acres in the central portion of Kāne‘ohe’s Mōkapu Peninsula as the Army’s Kuwa‘ahohe Military Reservation. Deactivated at the end of World War I, the reservation was leased for ranching until 1939, when it was reactivated as Fort Kuwa‘aohe.

In December 1940, Fort Kuwa‘aohe was renamed Fort Hase, in honor of Major General William F Hase, who served as Chief of Staff of the Army’s Hawaiian Department from April 1934 to January 1935. It served as headquarters of the Harbor Defenses of Kāne‘ohe Bay.

On the western side of the peninsula, Naval Air Station Kāne‘ohe was established in 1939; a base for squadrons of seaplanes to support the Pearl Harbor fleet was developed.

The work included dredge and fill operations that added 280 acres to the Kāne‘ohe Bay side of the peninsula, as well as filled low-lying areas for runway and hangar construction.

The great bulk of all reef material dredged in Kāne‘ohe Bay was removed in connection with the construction at Mōkapu of the Kāne‘ohe Naval Air Station (now Marine Corps Base Hawai‘i) between 1939 and 1945.

Dredging for the base began on September 27, 1939, and continued throughout World War II. A bulkhead was constructed on the west side of Mōkapu Peninsula, and initial dredged material from the adjacent reef flat was used as fill behind it.

In November 1939, the patch reefs in the seaplane take-off area in the main Bay basin were dredged to 10-feet (later most were taken down to 30-feet.)

It appears that a fairly reliable total of dredged material is 15,193,000 cubic yards. (Do the Math … Let’s say the common dump truck load is 10 cubic yards … that’s a million and a half truckloads of dredge material.)

The Air Station’s runway was about half complete at the time of the Japanese attack on December 7, 1941. Construction was begun on a modern-design gun battery located on a bluff above North Beach.

Battery Construction Number 301 was a single bombproof reinforced-concrete structure that housed projectile and powder rooms with an earth/sand cover. The plotting room, generator, and storage rooms were also contained within the structure.

This structure of steel reinforced concrete was covered with several feet of earth and was partially dug into the crest of the bluff. It was set atop the bluffs overlooking the beach. Located below the bluff to the front of the battery were the dormitory, mess-hall, recreation rooms, and latrine.

Battery 301’s guns covered the seaward approaches to Kāne‘ohe Bay from this location, 100 yards inland from the Mōkapu shoreline. It was one of the three initial batteries authorized for the Permanent Harbor Defense Project approved for Kāne‘ohe Bay.

Armament consisted of two 6-inch shield barbette carriage long-range guns. The guns were spaced some 210 feet apart and camouflaged with a steel-lattice rooftop appearing structure that rotated with the guns. The range was about 15 miles or 27,000 yards.

The battery’s exterior walls were 6 feet thick, interior wall was 18 inches. The Battery Commander’s structure was built directly on the roof of the main structure between both gun emplacements. The roof was built with two slabs totaling nine feet in thickness, and has a downward stairway leading into the battery and an upward stairway leading to the Commander’s station.

The radar room was located in the Commander’s station with the antenna mounted on the roof of the station. This antenna was disguised as a water tank for concealment. The radar was used to provide range and elevation for targets.

The fire control system for Battery 301 consisted of three stations: Podmore Fire Control Center on Kaiwa Ridge; Station “J” on the west rim of Ulupau Crater; and Heeia Fire Control Center on Puu Maelieli.

The final target practice of Battery 301 was conducted on November 22, 1944, when a regular day target practice was fired expending sixteen rounds. Battery 301 was then placed in a reduced manning status through the end of the war.

In 1946, the battery was designated in General Order Number 96 of the War Department as Battery French in honor of Colonel Forrest J French, who died on March 8, 1944. When Fort Hase was inactivated following the war and placed in caretaking status, Battery French’s guns were placed in experimental ‘mothballs.’

Following the disarming of the battery and its abandonment in the late 1940s, the magazine service structure was taken over by the US Navy for use as a laboratory. (Gaines)

The facility now serves WETS (Wave Energy Test Site). The Naval Facilities Engineering and Expeditionary Warfare Center manages WETS. Established in 2004, WETS is located off the coast of Marine Corps Base Hawai‘i. WETS provides developers a critical real world environment for testing and advancing marine energy systems.

Key features at WETS include the 30-meter test site, deepwater wave energy test sites (comprised of 60 meter and 80 meter berths), Heeia Kea Small Boat Harbor, Dedicated Vessel Approved Mooring Area, Pyramid Rock, Battery French and the MCBH Fuel Pier. (Sea Engineering)

In 2024, marine hydrokinetics pioneer, Ocean Energy USA LLC (part of Ocean Energy Group Ireland), announced that it had successfully deployed its 826-ton wave energy convertor buoy, the OE-35, at the Wave Energy Test Site of the Marine Base (it was touted as “the world’s first electricity grid-scale wave energy device”). (Lots here is from John Bennett, William Gaines, Tomonari-Tuggle & Arakaki)

February 15, 2026 by Peter T Young 1 Comment

Moku Manu

About 2-million years ago, much of the northeast flank of Koʻolau volcano was sheared off and material was swept onto the ocean floor (named the Nuʻuanu Avalanche) – one of the largest landslides on Earth.

The Pali is the remaining edge of the giant basin, or caldera, formed by the volcano. Mōkapu Peninsula (where Marine Corps Base Hawai‘i is situated) is evidence of subsequent secondary volcanic eruptions that formed, among other features, the islet of Moku Manu.

The majority of seabird-nesting colonies in the main Hawaiian Islands are located on the offshore islands, islets and rocks. Many of these offshore islands are part of the Hawaii State Seabird Sanctuary System.

These sanctuaries protect seabirds, Hawaiian Monk seals, migrating shorebirds, and native coastal vegetation. These small sanctuary areas represent the last vestiges of a once widespread coastal ecosystem that included the coastlines of all the main Hawaiian Islands. (DLNR)

Hawaiian seabirds today are subject to a number of threats to their survival, including predation by introduced mammals, habitat loss and degradation, and human impacts by people trespassing in seabird nesting areas.

Moku Manu (Bird Island) is three-quarters of a mile off Mōkapu Peninsula. It’s aptly named; it has the most diverse and one of the densest seabird colonies in the Main Hawaiian Islands. The state designated it the Moku Manu State Wildlife Sanctuary. (DLNR)

It is home to Uʻau Kani or Wedged-Tailed Shearwater, Noio or Black Noddy, Noio kōhā or Brown Noddy, ʻOu or Bulwer’s Petrel, Koaʻe ʻula or Red-tailed Tropicbird, ‘Ewa ʻEwa or Sooty Tern …

… ʻIwa or Great Frigatebird, Christmas Shearwater, Pākalakala or Grey-backed Tern, ʻā or Masked Booby, ʻā or Brown Booby, ʻā or Red-footed Boobies and various common shorebird species. (DLNR)

Moku Manu is protected as a state seabird sanctuary like its neighbors to the south, Manana, Kāohikaipu, and Mōkōlea Rock. “It is prohibited for any person to land upon, enter or attempt to enter, or remain in any wildlife sanctuaries …” Regardless, landing by boat is nearly impossible due to the lack of a safe beach.

The island is actually of two parts; the main western one is about 18 acres in extent and the smaller outer part is about three acres.

It has a relatively flat top, averaging about 165 feet in height but running up to 202 feet. The cliffs of Moku Manu drop directly into the sea around more than half of the island.

Moku Manu is perhaps the least accessible to humans of any of O‘ahu’s offshore islands. This fact seems to explain to an important degree the breeding of several species there that do not nest on any other of Oahu’s offshore islands.

Due to the challenging accessibility onto the island, it is rarely visited by unauthorized persons and not often by others (it is prohibited by law to go onto the island without a permit.)

During the last century or more, when the bird populations of more accessible offshore islands were depleted by man, and domestic plants and mammals sometimes introduced, Moku Manu remained relatively free from such influences.

The much longer canoe trip (there are no beaches near the head of Mōkapu Peninsula opposite Moku Manu,) the rough channel, and the uncertainty of being able to get on the island must have combined to keep even the old Hawaiians away much of the time. (Richardson & Fisher, 1950)

I grew up on Kaneohe Bay (on the other side of Mōkapu Peninsula from Moku Manu). No one sailed in our family. Except, as a pre-/early-teen, we did get a car-toppable Sunfish that I used to sail by myself in the Bay, usually in the main basin of the Bay.

However, one day I cruised to Coral Island, then ventured a bit more out the Crash Boat Channel to Turtle Back. And, from there, in the distance, I saw another target, Moku Manu.

After a while, and about halfway to Moku Manu, I realized this was probably not a good idea; folks at home thought I was leisurely cruising in the Bay, now I was in blue water, well outside the Bay.

No one knowing, no life jacket, no radio … a kid with no brains. However, the challenge was there and I eventually circled the island, and its birds, and safely headed home.

December 7, 2025 by Peter T Young Leave a Comment

Battery Pennsylvania

On the morning of December 7, 1941, a fleet of Japanese carriers launched an air strike against the US Pacific Fleet at anchor in Pearl Harbor. The attack decimated the ships and personnel of the fleet and thrust the US into WW II.

The USS Arizona (the second of two Pennsylvania-class battleships – built in 1916) was moored on “Battleship Row.” Just before 8 am, the ship’s air raid alarm was sounded and the crew was ordered to general quarters. During the attack the Arizona was struck by as many as eight aerial bombs.

In addition, one 1,700-lb armor-piercing shell penetrated the deck and detonated in the powder magazine, causing a “cataclysmic” explosion “which destroyed the ship forward” and ignited a fire which burned for two days. It is thought that most of the Arizona crewmen who perished in the attack died instantly during the explosion. (DPAA)

After the attack, the Arizona was left resting on the bottom with the deck just awash. (U of Arizona) Within one week of the attack, divers surveyed the submerged portions of the ship to determine which parts could be salvaged. (DPAA)

One of the divers, Lt Col Lawrence M Guyer of the Hawaiian Seacoast Artillery Command (HSCAC), concluded that, from an artillery viewpoint, Arizona’s aft turrets 3 and 4 (with three guns each) were serviceable and capable of being used on land.

Guyer was credited with establishing numerous seacoast gun batteries on O‘ahu, including four batteries, each armed with two twin-gun 8-inch 55-caliber naval mounts removed from the aircraft carriers Lexington and Saratoga in early 1942.

Before the Japanese attack on Pearl Harbor, the coastal defenses for the island were considered extremely inadequate. Standard coast artillery then in production would have taken two to three years to procure, and Arizona’s 14-inch guns had much greater hitting power than the 6-inch and 8-inch guns being used on O‘ahu at the time. (John Bennett)

The Navy decided that the Army would receive gun turrets 3 and 4 for use as coastal defense guns. (NPS) In June 1942 the Hawaiian Department Engineer and representatives of the Hawaiian Seacoast Artillery Command examined potential sites on O‘ahu after the War Department gave preliminary endorsement to reusing both 14-inch naval turret batteries.

Two sites were selected: one at Mōkapu (Kāne‘ohe – to cover the eastern portions of O‘ahu) , and the other at Kahe, an area known today as Electric Hill (HEI generating plant) on the western shore of Oahu, up the slopes of the Waianae Mountains – to cover the south and west.

Arizona’s aft guns were removed in May 1942. Because the removal of the turrets began before any consideration was given to their reuse, no consideration was given to their reassembly, and no attempt was made to safeguard the integrity of the turret shells, which had been separated into two major components.

The Navy’s 150-ton heavy-lift floating crane transported Turret 4’s faceplate and slide assembly and the aft catapult to Waipio Point for safekeeping in early March 1942. The smaller turret components were removed from the Arizona, transported to the Pearl City Peninsula, and taken to a nearby yard and warehouse, where they were set aside for the salvage operation in May 1943.

Once ashore the equipment was disassembled completely; then the time-consuming task began – cleaning the small parts of corrosion caused by immersion in seawater for over a year. This included reworking and rewinding electrical motors and completely overhauling the hydraulic systems. (John Bennett)

Batteries Pennsylvania (at Mōkapu) and Arizona (at Kahe) were named on October 21, 1942, by a directive from Brig. Gen. Robert C. Garrett, commanding HSCAC. Garret approved the construction plans for both batteries on May 7, 1943.

The adjutant general of the army gave final approval to both projects on August 13, 1943, based on a Hawaiian Dept. letter of May 11, 1943, ‘Plan for Batteries Arizona and Pennsylvania.’

The most complex project undertaken during World War II at Mōkapu Peninsula was that of the construction of Battery Pennsylvania at Mōkapu Point.

Battery Pennsylvania is a 7-stories deep self-contained unit, gouged out of the side of Ulupa‘u Crater. It contains reinforced concrete rooms for radar, plotting, powder and shell storage and eating and sleeping quarters for approximately 160 troops. The battery was completely air conditioned.

Project engineers had to design a central concrete barbette well that extended 70 feet down in rock. The nucleus of the battery was the barbette (the gun mounting system): 42.5 feet in diameter and 70 feet deep.

To sustain a vertical load of 780 tons and a firing thrust of 2,620 tons, a heavy circular steel foundation ring supported the roller path, with radial webs anchored to the reinforced concrete barbette that ranged from nine to 15 feet thick.

The barbette contained three service levels; the first two levels were accessed from the powder and projectile magazines 70 feet below ground. Ammunition service was by a pair of naval-style shell skips powered by motor-winches that raised the shells from the floor of the magazine to the shell-loading platform in the turret 45 feet above.

The capacity of this room was 105 shells aboard ship; the number was increased to 150 at the batteries. A pair of powder hoists similar to those aboard ship raised the powder bags to the powder handling room, 25 feet above the magazine.

It took nearly four years to build the battery and reassemble the gun. In 1944, Army Ground Forces had scheduled Batteries Arizona and Pennsylvania to be manned by four officers and 157 enlisted men each when completed.

Battery Arizona’s construction was halted on August 1, 1945. Although the turret and guns had been mounted, the battery still lacked some components. It was not probable that it was turned over to the coast artillery and manned. The heavy guns at Battery Arizona were never test fired.

Only Battery Pennsylvania was fully completed; it was completed just before the end of the war in the Pacific. Battery Pennsylvania was test fired on August 10, 1945 (the only firing of its guns). (HABS) Today both sites are abandoned; the guns were removed and cut up for scrap shortly after the war ended. (Lots of information and imagery is from John Bennett.)

March 12, 2025 by Peter T Young Leave a Comment

Mōkapu Peninsula

“I learnt, that their present king’s name was Taheeterre [Kahekili], and that he was also king of Morotoi [Molokai] and Mowee [Maui]. The old man informed me, that his residence was in a bay [Kāne‘ohe Bay] round the West point, and importuned me very much to carry the ships there, as that place, he said, afforded plenty of fine hogs and vegetables.”

“Indeed, I had some reason to think, that the inhabitants on that part of the island were more numerous than in King George’s Bay [Maunalua Bay], as I observed most of the double canoes came round the West point; but as the people now brought us plenty of water, I determined to keep my present situation, it being in many respects a very eligible one …”

“… for we hitherto had been favoured with a most refreshing sea breeze, which blows over the low land at the head of the bay; and the bay all round has a very beautiful appearance …”

“… the low land and vallies being in a high state of cultivation, and crowded with plantations of taro, sweet potatoes, sugarcane, &c. interspersed with a great number of cocoa-nut trees, which renders the prospect truly delightful. …”

“Potatoes and taro are likewise met with here-in great plenty, but I never observed any bread-fruit, and scarcely any yams; so that there is reason to suppose they are not cultivated by the inhabitants of Woahoo [O‘ahu].” (Capt Nathaiel Portlock, June 1786)

Mōkapu received its basic formation when volcanic eruptions of the southeast end of the Ko‘olau mountain range produced many lava flows and much falling rock. These same eruptions produced secondary tuff cones now known as Diamond Head, Koko Head and Punchbowl. (Steele, MCBH)

Like Lē‘ahi (Diamond Head), Ulapa‘u tuff is a volcanic rock made up of a mixture of volcanic rock and mineral fragments (they were likely explosive volcanic eruptions). (SOEST)

“The ahupua‘a of Heeia and its sources of foods such as the sea pond of Heeia, the large mullet of Kalimuloa and Kealohi, the reef of Malauka‘a where octopus were found, the travelling uhu and ohua fishes, and the wooden bowls of Mokapu, belonged to Maui-kiikii (Top-knot Maui).” (Kamakau in Sterling & Summers)

Mōkapu Peninsula encompasses portions He‘eia and Kāne‘ohe – these are extensions of the ahupua‘a across the large basin of Kāne‘ohe Bay. Mōkapu peninsula is further sub-divided into six sections.

The tip of the left lobe of the peninsula was called Mōkapu and was in the He‘eia section, while Heleloa, Kuwa‘aohe, Ulupa‘u, Halekou-Kaluapuhi, and Nu‘upia, rested in the Kāne‘ohe district. (Sterling & Summers)

“The two divergent lobes of Mo-kapu possess distinctive features. The left lobe … is marked by Hawaii Loa crater, the coral bluffs, lava sheets, Pyramid Rock, and stone ruins. The right lobe is dominated and terminated by the Ulu-pa‘u crater. This is a broad, shallow, saucer-shaped vent, a truncated hollow cone, very similar in appearance and structure to Le-ahi.” (MacCaughey, 1917)

‘Mōkapu’ is the contraction of ‘Mōku Kapu’ … ‘mōku’ (island) and ‘kapu’ (sacred or restricted), which means “Sacred or Forbidden Island.”

The sea and bays around Mōkapu were kapu in pre-contact days. The right to fish in the surrounding waters was granted only to the high chiefs and servants of the king. These fishing grounds were called ko‘a. (Steele, MCBH)

Fishing was confined to certain types of fish native to certain sections of the ocean. Persons were assigned to areas with the task of feeding the fish two or three times a week. (Steele, MCBH)

Though Mōkapu Peninsula had only limited fresh water, ‘uala (sweet potatoes) and ipu (gourds) were cultivated there. It is also likely that other mulched dryland crops such as kalo (taro), ko (sugar canes), niu (coconuts), ‘ulu (breadfruit), and the pia (arrow root) also grew there.

However, the most important resource of the peninsula were its loko i‘a (fishponds). There were at least five loko i‘a on Mokapu Peninsula, including Ka-lua-puhi (literally: The eel pit), Nu‘u-pia (interpretively: arrow root mound) …

… Hale-kou (interpretively: House surrounded by kou trees), Hele-loa (literally: Distant travel), Muli-wai-‘olena (interpretively: Turmeric [yellowish] estuary), and Pa-‘ohua (literally: Fish fry enclosure). (Maly)

Prior to Polynesian settlement, the ponds were thought to be a shallow open channel between Kāneʻohe and Kailua Bays, making Mōkapu an island, connected to Oʻahu by a thin coastal barrier dune.

Kaneohe Ranch began in 1893, when Nannie Rice leased 15,000 acres to JP Mendonca and C Bolte for cattle ranching. Incorporated as Kaneohe Ranch Company, Ltd. in 1894, the lands were leased and primarily used for raising pineapple, processing sugar, and cattle operations.

In 1905, James Bicknell Castle acquired the cattle ranching interest of Mendonca and Bolte, and in 1907 he purchased large blocks of shares in the cattle operations of the Kaneohe Ranch Company.

In 1917, Harold Kainalu Long Castle, son of James B Castle, purchased the title to 9,500 acres of land from Mrs. Rice, which included the ‘iii of Heleloa. (HABS No. HI-311-L)

The United States’ military presence on the Mōkapu Peninsula area initially began in 1918. It was through President Woodrow Wilson’s Executive Order No. 2900 that the Kuwa‘aohe Military Reservation was established. (HABS No. HI-311-L)

Use and ownership has been shared and alternated between the Army and Navy over the years. Following the Base Realignment and Closure Committee’s decision to close NAS Barbers Point, the Kāne‘ohe base acquired 4 Navy P-3 patrol squadrons and one SH-60 Anti-Submarine squadron in 1999.

Today, there are almost 10,000 active-duty Navy and Marine Corps personnel attached to the base. The Marine Corps Base Hawai‘i (MCBH) on Mōkapu maintains and operates the airfield and other training facilities in support of the readiness and global projection of DoD and military operating forces. (MCBH)

January 9, 2025 by Peter T Young Leave a Comment

Military Units on the Mōkapu Peninsula

At present, the Marine Corps Base Hawai‘i (MCBH) on Mōkapu peninsula at Kāne‘ohe Bay maintains and operates the airfield and other training facilities in support of the readiness and global projection of DoD and military operating forces. (MCBH)

The Base has trained countless carrier pilots for combat, provided logistical support for naval aviation forces throughout the Pacific, and supported airborne early warning and antisubmarine patrol operations. (Marines)

But the Marines weren’t there first, and they aren’t alone. Let’s look back …

On February 6, 1901, the US Army artillery corps divided into separate field and coast artillery components by General Order 9, War Department, implementing the Army Reorganization Act (31 Stat. 748), February 2, 1901.

Tactical artillery districts, each consisting of one or more forts and accompanying mine fields and land defenses, were established by General Order 81, War Department, June 13, 1901, to protect the Atlantic and Pacific coasts of the United States and the coasts of Hawai‘i and Puerto Rico. (US Archives)

Renamed Headquarters Coast Defenses, following World War I and until the end of World War II additional coastal batteries were constructed throughout the Island.

President Woodrow Wilson’s signing of Executive Order No. 2900 established a military reservation on July 2, 1918 and set aside 322 acres of public land on the Mōkapu peninsula for military use. The first name for the Army installation on the east side of the Mōkapu peninsula was Kuwa‘ahohe Military Reservation.

In 1927, the Oahu contingent of the Army’s Coast Artillery Corps, based at Fort Kamehameha since 1908, established a coast defense position at Ulupau.

It began after WWI, when the Army expanded its ideas of how the Coast Artillery units of Fort Kamehameha should be protecting Pearl Harbor. Army planners realized that in addition to providing protection against a naval bombardment of Pearl Harbor, it was also necessary to prevent enemy forces from landing anywhere on Oahu.

This was to thwart a possible land attack on the naval base. In 1922, upon the signing of the Washington Naval Treaty, the US diverted twelve 240mm howitzers to Hawai‘i from shipments originally bound for the Philippines.

Article XIX of the treaty prohibited new fortifications or upgrading of coastal defenses of US, British, and Japanese bases in their small island territories in the Pacific. The treaty allowed expansion at the US bases in Hawai‘i, Alaska, Panama Canal Zone, and the mainland. (HABS 311-P)

Between WWI and WWII, ranchers leased some portions of the Kuwa‘aohe Military Reservation. Army usage at Kuwa‘aohe began to increase in anticipation of war. Although the Army did not man the former 240mm howitzer battery, they formed various coast artillery batteries and activity increased at the installation.

From 1940 to 1941, the military reservation had a different Hawaiian name – Camp Ulupau. The change in 1942 to Fort Hase honored Major General William Frederick Hase. He was the Chief of the Army Coast Artillery Corps from 1934 until his death. He received the Army Distinguished Service Medal for his service in France during WWI.

Fort Hase was the headquarters for the Army’s Harbor Defenses of Kāne‘ohe Bay (HDKB), created about 1940 to defend NAS Kāne‘ohe. Prior to and during World War II, Fort Hase grew from a humble beginning as a defense battalion to a major unit of the Windward Coastal Artillery Command.

About this time, Navy planners began eyeing the Mōkapu peninsula as the home of a strategic seaplane base. They liked the isolated location, the flat plains for an airfield and the probability of flights into prevailing trade winds.

The Navy acquired 464 acres of the peninsula for use by the PBY Catalina Patrol seaplanes [PB representing ‘Patrol Bomber’ and Y being the code assigned to Consolidated Aircraft as its manufacturer] for long-range reconnaissance flights. One year later, the Navy owned all of the Mōkapu peninsula except for Fort Hase. (Marines)

The Kāne‘ohe Naval Air Station was established following a recommendation by the Hepburn Board in 1938 to develop a base for squadrons of seaplanes to support the Pearl Harbor fleet. Construction of NAS Kāne‘ohe started in September 1939. By the end of 1941 the air station had approximately 90 permanent and 60 temporary buildings. (HABS 311-M)

The initial design for NAS Kāne‘ohe was to support five seaplane patrol squadrons. The first work was dredging seaplane lanes and using the spoils to fill shallow bay areas (about 280 acres total of filled land) for building sites.

Extensive dredging of Kāne‘ohe Bay and its entrance channel enabled ships and seaplanes to utilize the bay, and, of equal importance, provided the large amount of fill needed to enlarge the buildable area of Mōkapu peninsula. (HABS HI-311-P)

On December 7, 1941, the Imperial Japanese Navy attacked the air station minutes prior to the attack on Pearl Harbor. Of the 36 Catalinas stationed at the base, 27 were destroyed, six others were damaged, and 18 sailors perished in the attack.

The first Japanese aircraft destroyed in action were shot down at Kāne‘ohe, and Aviation Ordnanceman Chief Petty Officer John Finn, stationed at Kāne‘ohe Bay, was awarded one of the 1st Medals of Honor for valor on that day. (Marines)

The naval air station’s Search and Rescue Crash Facility (SAR) was responsible for the rescue of any boats in distress in Kāne‘ohe Bay, or any planes which might crash into these waters. Their charge was to save lives and attempt any possible salvage.

By August 1946 the SAR at Kāne‘ohe Naval Air Station managed twenty one boats, including three crash boats, each 63 feet long. Crews were responsible to check the permits of privately owned boats in Kāne‘ohe Bay waters. (HABS 311-M)

The first permanent Coast Guard aviation unit in Hawai‘i became reality in 1945 when a unit was located at the Naval Air Station Kāne‘ohe. The Coast Guard Air detachment was established to provide air-sea rescue services.

Coast Guard Air detachment runs went from Kāne‘ohe to Hickam Field, then Johnson Island, Majuro, Kwajalein, Guam, Sangley Point to Japan and then back through Wake, and Midway. The trip took between 20 and 28 days.

In 1949 the Navy decommissioned the Kāne‘ohe air station and the Coast Guard air detachment moved to NAS Barbers Point on the west coast of O‘ahu and was established as a Coast Guard Air Facility. (Coast Guard Aviation Association)

After WWII ended, Fort Hase “became a skeleton outpost” for the Army. It remained under Army jurisdiction until 1952 when the land became part of Marine Corps Air Station Kāne‘ohe. (HABS HI-311-P)

The Marine Corps assumed control of both Fort Hase and the air station after landowner, Mr. Harold K. Castle, refused to take back the property in 1951. Castle believed it was important to maintain a military base on the windward side of Oahu for defense and economic continuity. (MCBH)

On January 15, 1952 the Marine Corps re-commissioned the idle airfield Marine Corps Air Station Kāne‘ohe Bay, making it a training site for a combined air/ground team.

Following the reactivation of the Mōkapu installation in 1952 as a Marine Corps Air Station, the Crash Boat operations were manned by an all-Navy unit, and organizationally was attached to the Airfield Operations Department as a Waterfront Operations Branch.

Station Operations and Headquarters Squadron supported flight operations until June 30, 1972, when Station Operations and Maintenance Squadron (SOMS) was created to take its place.

SOMS served until it was disbanded on July 30, 1994. Marine Corps Air Facility, Kāne‘ohe Bay was formed on that date. Following the Base Realignment and Closure Committee’s decision to close NAS Barbers Point, the Kāne‘ohe base acquired 4 Navy P-3 patrol squadrons and one SH-60 Anti-Submarine squadron in 1999.

Under the 1994 Base Realignment and Closure the Marine Corps consolidated all of its installations and facilities in Hawai‘i under a single command, identified as Marine Corps Base Hawai‘i (MCBH); Marine Corps Air Facility (MCAF) and Headquarters Battalion (HQBN) are subordinate commands. The 1st Marine Expeditionary Brigade was also deactivated. (MCBH)

On May 22, 2009, a redesignation ceremony was held renaming Marine Corps Air Facility to Marine Corps Air Station Kāne‘ohe Bay and the commemorative naming of the Airfield to Carl Field in Honor of Major General Marion Eugene Carl USMC.

Major General Carl, the Marine Corps’ first air ace who downed 10 enemy aircraft during the battle for Guadalcanal, was twice awarded the Navy Cross, and who finished World War II with 18 kills to his credit, was killed June 28, 1998 during a robbery at his home in Roseburg, Oregon.

A Memorandum of Agreement between MCBH and Coast Guard Sector Honolulu calls for MCBH to provide rescue vessels and waterfront operation resources, and to coordinate with the Coast Guard Sector Honolulu’s Command Center (SCC) for SAR efforts in the vicinity of MCBH / Windward Oahu. (MCBH)

Known today as the Marine Corps Base Hawai‘i (MCBH), Kāne‘ohe Bay, this facility occupies virtually the entire peninsula and houses thousands of military personnel and their dependents. (HASS HI-311-C) Today there are almost 10,000 active-duty Navy and Marine Corps personnel attached to the base.