Shortening the Prayer at Sea

Q: I am a man who works in the naval forces with sailors. We set sail from the port to the sea for a period of three or four days. Is it permissible for us to shorten the prayers and combine them? Please note that our departure does not take us far from the city, but only for certain duties. I ask you to inform us.

A: A passenger on a ship, or on other types of sea vessels, such as a passenger in a car on land or a train on land: if the distance is the distance for shortening, then he shortens and combines; otherwise, he does not. If the ship is around the port and around the coast, and does not go far, such as a distance of ten kilometers, or twenty kilometers, or something like that, then he does not shorten, and it does not have the ruling of travel. However, if it goes far, to what is called travel, such as seventy kilometers, eighty kilometers, one hundred kilometers, or more, then this is travel. For its people, shortening and combining the two prayers are permitted; because they are travelers, like the one who went out to the wilderness for a picnic or something like that, for eighty kilometers, seventy kilometers, or ninety kilometers, or one hundred kilometers, or more than that.