Can ships act as gunboats and deal damage to enemy units or structures on land through coastal bombardment?
There are several missions available:
Patrol - Focus on finding the enemy as efficiently and as spread out as possible
Search & Destroy - Much like Patrol but less efficient at searching while keeping the fleet together more. Suitable for trying to force large fleet vs fleet battles, say like the Battle of Midway.
Convoy Raiding - Focus on raiding convoys and avoid engaging warships.
Convoy Escort - Protect any convoys in an area from raiders.
Invasion - used to control large scale land invasions. We'll cover this in later diaries.
Hold - Not really a mission, but can be useful for ships like Carriers that you want to just position like a floating airfield...