The first Naval Warfare war will start on Thursday the 26th of October at:
12:00PM ET - CHARLIE SHARD
2:00PM ET - ABLE SHARD
More information on multiple shards and their launch times, see this post.
The starting conditions for the war on both shards will be:
EDIT: In this image Loch Mór has an additional Relic Base. This is incorrect.

To accommodate for anticipated larger player populations in this war, the following modifiers will be in effect:
Soldier Supplies yield from Hospitals and Field Hospitals will be higher than normal wars
There will be more logistics towns than normal wars
There will be a higher volume of starter equipment at bases than normal wars
Salvage respawn rates may be scaled up