Another sub on the map plus follow the sub camera view.

[Col7777]

I altered a ready done mission the other day and in the alteration I changed the properties on the the convoy in the mission using the entries from the above posts.
This will not suite a lot of you but it can be handy if creating a mission and you want to know where the ships are etc.
After 30 mins of TC all the ship's icons appear on the map screen, plus you can then use the (.) key to view your/player sub and stick with it as well as the other vessels when they are within range.
As yet 30 mins is the least time it takes to activate the ship cam for the player sub, you can see this change on the map screen by the ghost icon that reoccures every now and again.