OOC: part 2
This is true. But, you can get a lot 9f the same nutrients from kelp and seaweed. Seaside and oceanic societies have been doing so for centuries, if not millenia. We don't always have to forage on land.
There are other things that we have been forgetting about having a ranger on board regarding favored terrain:
Difficult terrain doesn’t slow your group’s travel.
Your group can’t become lost except by magical means.
Even when you are engaged in another activity while traveling (such as foraging, navigating, or tracking), you remain alert to danger.
If you are traveling alone, you can move stealthily at a norm al pace.
When you forage, you find twice as much food as you normally would.
While tracking other creatures, you also learn their exact number, their sizes, and how long ago they passed through the area.
Now, an argument could be made that it the ability is Overland Travel and does not include the water. But, on the coast, the water is just as much a part of the terrain as the land, just as a river or a lake or a stream is anywhere else. Plus, technically, the water covers land. While you can't actually track in water, if you see the wake caused some creature (or a school), then that information would be discernable. With his knowledge of ships, he should even be able to tell the number if crew and how laden with cargo a ship is by how low it rides in the water.