Hey, I am an electronics enthusiast and have recently gone on a cruise in the Carribean, I brought along with me my homemade GPS inside of an Altoids Tin (Something like this:
). When I was on the cruise, there were no cell towers anywhere and I got reading very quickly (Like within 5s). Please note: When I am in my apartment (I live in NY) It takes around 30s to get a reading. Even if there was a cell unit on the cruise(There was not, I did not get any cell reception) don't you think I would get faster readings in NY where there are cell towers all around? GPS module used:
https://www.adafruit.com/product/746.
PS: Don't try to lecture me on how GPS modules work, I know the ins and outs of them like my own house.
Also: Try to only give me scientific evidence, nothing like: "They probably have a secret cell unit on the ship just for this purpose" or "THE GPS UNIT IS FAKE"
Good Luck debunking this!