DAMMAM, Saudi Arabia: Iran has released a new map claiming control over the Strait of Hormuz, which could make things even harder for thousands of sailors stuck on ships in the Middle East.

More than 20,000 sailors are trapped on about 2,000 ships. Many cannot leave their vessels, have limited food and fresh water, and are worried about their safety in a war zone.

Sailors who spoke to Reuters said they are facing serious difficulties and stress. A workers' group has also warned that conditions are very bad. One Indian sailor said they spend their time just trying to get through each night and praying they are not attacked.

When a supply boat reached ships near the Saudi coast, sailors gathered to wave, showing how rare contact with the outside world has become. For almost three months, they have been living in isolation, staying in small spaces and working under extreme heat.

Iran closed the Strait of Hormuz, an important global oil route, after attacks by the U.S. and Israel began on February 28. This trapped many ships, and with peace talks not progressing, Iran is continuing the blockade.

A new authority set up by Iran has issued a map reinforcing its control over the area. Ship owners now have to navigate a complex system of payments and approvals to move their vessels.

A workers' federation said sailors are facing even greater risks because of the war. There have been cases of delayed pay, lack of supplies, and fear of missile and drone attacks. Some sailors have even called for help while in tears. Over 2,000 sailors have contacted the group for assistance since the conflict began.

Near the Saudi port of Dammam, several large ships can be seen waiting at sea, an unusual sight. When supply boats arrive, sailors call out as they receive medical and other essential goods.

Mohit Kohli, captain of a large German-owned cargo vessel, said he never imagined the Strait would close. After the war began, his crew started seeing and hearing missiles and drones, which changed their mood completely. They became quieter, ate quickly, and spoke less.

"Seafarers' vulnerability and exposure is more, let's say, extreme because of the war," said Mohamed Arrachedi, network coordinator for the Arab World and Iran at the International Transport Workers' Federation. "The profitability has gone down, and the export turnover and the domestic turnover have gone down significantly."

Some sailors now survive on just one simple meal a day and have very limited internet access to contact their families.

Arab countries are trying to help by providing supplies and allowing crew changes. Authorities say they have helped many ships get food, water, fuel, and medicine, and have assisted hundreds of sailors in leaving their vessels.