Contact tp family in a sub

How can you contact with your family in a sub. is there any other way apart from email when in port and family grams and letters when you are in port is there any other way you can make contact?

 

thanks mate i put this in forum. thanks though

 

You write a note and put it on a lead bottle!

 

apart from certain T-boats, fitted with the Inmarsat capability, lets you send and receive e-mail at sea. (within operational constraints)