The attached image generally shows Kāne‘ohe Bay as it is today.
The Marine Base is at the bottom/right, the “Ship Channel” runs from there, all the way to the top of the image, past Mokoli‘i (Chinaman’s Hat) across from the Kualoa Park.
Zoom in and you can follow the channel from the Base, weaves through the Bay, to the entrance/exit at Mokoli‘i.
Notice the patch reefs with discernible straight edges … that’s the result of the dredging operations.
Likewise, you can see areas that have clear cuts in reefs that look submerged (almost like shadows between untouched reefs and deeper water) – these were the areas dredged to lesser depths.
(Here’s a link to download a high resolution of the UH SOEST Kaneohe Bay Poster: