Why would anyone need an oasis on the sea?
An oasis of land compared to endless ocean water.
The vast oceans occupying nearly 2/3 of earth’s surface have killed lots of human beings. Capsizing of boats being the biggest reason.
When I am on a cruise, it is amazing to see nothing but water all around as far as the eye can see, for 2 or 3 days of sailing at 20 knots cruising speed. The TV in the cabin displays current depth of ocean below the ship. Sailing from Port Canaveral to St Thomas, I noticed 4 miles deep sea below the ship. Oasis of the ship is estimated to stay afloat for 4 hours before sinking, should it’s hull hit a rock or some other structural failure. Then it will be another 4 hours to reach the ocean bottom.
The mighty ship is the what keeps people alive. And so it is indeed an Oasis in the vast Sea. Same as oasis in a sand desert with hundreds of miles of hot and nasty sand all around.