Navigation in ancient times was no more complicated than keeping the coast in sight as you sailed. If you came to a large bay where you couldn't see the opposite shore, you sailed all the way around it instead of crossing it.
Water is a highway, not a barrier. Any skilled navigator knows that the sea is far more dangerous near the shore than in open water. Being blown onto the rocks is the biggest risk. Any Phoenician worth his salt would have steered clear of land.
The compass was invented in China in the 4th century BC but not for navigation. It was used in fortune telling. It took another 1200 yrs. before anyone attempted to take to the seas.
There was a trade industry in Crete in the 6th century BCE. They manufactured fancy trinkets to exchange with native tribes. Tens of thousands of Cretan trinkets have been found all over South and Central America, along with many coins and other items from Carthage and the middle east.
When Julius Caesar conquered the Celtic navy in about 72 BC he wrote in his chronicles that the Celtic navy was comprised of true sailing ships capable of sailing all the oceans of the world. Those compared to his Roman triremes which were mostly rowed in calm water.
Cross Atlantic navigation was common for many centuries before Carthage and the Celts lost their wars with Rome and it was ended.
Apparently, sailing/fishing naked was common practice. The diapers were all about those Bible movies. What would be the point? Why find yourself trying to swim in a soaked and heavy muslin brief? The Bible made reference to naked boating as I remember from back when, being taught in Sunday school.
Jbee
Naked and ships go together. Clothes are a big problem on a long ocean voyage. Salt water makes for a poor laundry and leaves salt encrusted fabric. Fresh water was scarce. Best just leave the clothes in your locker until you hit port again. Nudity on board ship was common in the British Navy in days of sail.
Bob