Fleet, transport by sea | Army TW: Rome II Guide
Last update: 11 May 2016
Managing the fleet is very similar to managing the army. New fleets can be raised in coastal settlements with a port and can be replenished at friendly or common sea regions. Damaged ships can be quickly repaired in docks.
Same as with land armies, fleets have several types of movement. These are: Double Time (equivalent of Forced March), Patrol (equivalent of Fortify) and Raid. Your ships can also attack enemy port, completely blocking an access to it and stopping sea trading.
Transport
Transporting army over the sea is not demanding. Just point commander of your land army over the marine area, and army will board transport ships. You have to remember about providing proper support for such units in form of navy, because transport ships can be easily destroyed. To do this, you have to select the transported army and click RMB on naval ships - navy units will protect your vulnerable troops.
In the case of the naval battle I suggest avoiding fighting them and ultimately carefully approaching enemy and boarding them. Make sure to avoid ramming units - one hit can destroy the entire unit!