English to Spanish Tech/Engineering Ships, Sailing, Maritime Yachts class rules

Hi, I have just finished translating a significant project and there are a few terms I would appreciate you help me with. It's from a technical document describing class rules of yachts and different parts of yachts and I would like to know the exact term. I very much appreciate your input and help.

Context is :
(a) “The corrector weights shall be distributed with 1/3 of total corrector weight permanently mounted under centre shelf in saloon, equally divided between port and starboard, and 2/3 of total corrector weight permanently mounted under floorboard just behind main bulkhead. Position defined according to Appendix H6.“

Thanks a lot :)