With considerable krew, cargo and health, the Calm Spirit is one of the smaller Big Mamas in the game.
It's design is similar to that of the Royal Fortune, and it has similar rigging.
The Calm Spirit 2 is seldom used due to its high price compared to what the ship actually gives. Although it is an option for a captain to use, there are better options to use (such as the Junkie and the Raider) for the same price.
With the Calm Spirit 2
With this ship, targeting smaller ships and Traders is the optimal strategy.
Stay away from fleets of smaller ships (such as the Baby Fancy)
Against the Calm Spirit 2
Any larger ship with better stats can be used to take down the Calm Spirit.