"Slave Ship" is a Liberation objective in Freedom Cry.
Description
A white hulled vessel bearing an icon above it. These let you free a high amount of slaves.
Walkthrough
You need to cripple these ships. Sinking them will kill off all the slaves found inside. Just like other ships you will get plunder in addition to the freed slaves. Once you have the Credo, it is a great way to boost the numbers of liberated slaves and recruit Maroons.