I'm on a Boat (25 player)

I'm on a Boat (25 player) is an achievement rewarded for emerging victorious out of the Gunship Battle within the Icecrown Citadel on the 25 player mode.

Source
The is the third encounter in Icecrown Citadel.

Strategy
It is important to note that a battle rez will count towards being on a boat twice.

Similar to the strategy for getting the 10 man version, however the DPS is divided up into four groups, each one centered around a tank. Tank 1 and his DPS jump over for the first mage, Tank 2 and his DPS for the second mage and so on and so forth.

Healers need not jump over if Saurfang or Muradin is tanked towards the edge of the ship. Healers should be able to heal the tank while staying on their respective boat.

Trivia

 * The name of this achievement is a reference to The Lonely Islands song I'm On A Boat.