Is there a signal at sea?

Cell phone signal depends on the coverage of local mobile or Unicom base station signal, beyond which there is no signal. Offshore fishing boats generally use walkie-talkies, which is what we call single sideband. Ocean-going fishing boats use satellite communication.

When sailing at sea, the signal at sea is not very good, so satellite phones are used. There are all kinds of modern equipment on board, so it is no problem to use satellite phone, and it needs to pay a certain fee, which is completely affordable compared with the high salary of seafarers.

Extended data:

Pay attention to when going out to sea with the ship:

First, be optimistic about the offshore wind forecast before going out. It is not suitable for going out to sea if the wind exceeds level 5 or above. Choose to go out to sea at four or five o'clock in the morning when there is no wind or breeze, and don't stay away from the shore so as to return quickly when it is windy.

Second, check whether your fuel is sufficient before going out to sea, and don't take a boat with bad condition or fault.

Third, take your mobile phone with you in case you send a distress signal under special circumstances.