What is the reason why the ship general navigation can't receive the Beidou short message?

Look at your position first. At present, the use of Beidou chat is probably in Southeast Asia. If it is out of coverage, you will not receive the information. However, with the expansion of the service scope of Beidou satellite system, the use scope of Beidou chat will also change. The second is to see if your operation is correct. Beidou chat can receive information normally without obstruction. If there are obstacles, it will hinder the reception of signals, and try to face the antenna area to the south. Finally, see if the equipment is broken. If the equipment is broken, you have to contact the chat group. Beidou chat has feedback function, you can try it. I hope I can help you, and I hope to adopt it!