ketches

To withstand the recoil of the cannons with their heavy projectiles, the bomb ketches had to have a massive and firm hull.
炮船有一个巨大的和坚定的船体，在发射重型炮弹时经受大炮的后坐力。
Many ketches, therefore, are different from sloops in ways other than just the masts and sails.
因此，双桅帆船除了桅杆和帆的区别之外，在其他很多方面也会和单桅帆船有所不同。
Designed as cruisers, many ketches are heavier, more stable in sea conditions, and more commodious down below.
因为它们生来就是为了远行之用，因此它们通常更重，在各种海洋状况下更稳定，船舱也更宽敞。