Colony Vessel
You need a colony vessel to take over another island. It is, however, not a wise move to send this ship alone, because it is unarmed and defenceless; your colony vessel may be shattered at the coast of the target isle. Therefore, this ship is only safe if it has an armed escort.
The colony vessel is the most expensive and also the slowest ship of the whole fleet. When you have colonized an
isle with your settle ship, it is "exhausted" and gone afterwards.
A colonization is successful as soon as all military land and armed sea units have been removed from the island, and
the defensive buildings - i.e. stone wall,
watch tower and main building - have been entirely razed (i.e. they have been taken down to level 0). (see also conflict & settlement)
Preconditions to construct the settle ships: