Well i dont have great ideas for it, but see some of:
(i've used Google translator if you find something wrong was not me :P )

tip 1: we can put the Yamato anime star blazers as BB7.

Q: Why?

A: In the anime he "flies" is a "aircraft carrier" can serve a possible BB7 but we already have the Atago: P so do not need this idea.

Tip 2: then I suggest one ballistic missile ship with a system you should shoot and hit the target to halt the missile until it reaches its alvo.esse would be formidable Kirov (now Admiral Ushakov) Russian Navy battleship with their several missile launchers can sink even the most powerful BB6 the Navy (at least in my mind: P)

Q: but that's appeal, so one of these could destroy all the ships of the enemy fleet

A: As I said before you would have to stay with the "sights" (the mouse) on the target, in the game we have the SD, and a great armor system 1 missile just do not destroy as easy ship and the development team would do something to a time frame for the release of each missile that would have an almost equal system of a plane because we know that a missile can be shot. with incredible customization system Navyfield q believe it will not only carry missiles and torpedoes and cannons believe his scout would be a helicopter that could attack with torpedoes and / or missiles making it a great and formidable BB7.

 Tip 3: customizable hulls you possibly win an event and would allow you to create a ship exclusively modifying their displacement, space, shells, maybe range, armor, hulls, cannons and class name. I did not think of many options but I think the BB7 could be or should be created by the player can use sailors of all nations and equipment (I would be happy creating a ship can use almost everything in it, for example, a ship with hull bismark with 6 cannons x4 18.89 of alsace with BBV engine and BRITISH Armor) I do not have very creative ideas ... but all think this is the best ^^.