center has plenty of drop beacons in the water, and on rag I believe you can swim your mounts up to the edge of the red obi to upload, you just cant take them back out from there
There are a few drops by redwood on rag. Close to red ob. They not in water but fucking close. Upload one watertame an try one of those to see if it works. There is one drop especially below lighthouse on rag. Its almost in the water. Good luck trying