The keel, with the floors of the frames and the bottom longitudinals, form the cellular structure extending about two-thirds the length of the hull known as the double bottoms.
Isiseko, ngemgengethe wefreyimu no bubenzi obusezanlisi, yenza isekhiwo esintsefuntsefu esinabe mayela nebude besiqu ebuyi ? ebogiwa ngengomzonlsi ephindaphinde neyo.