First the deck number establishes the deck on which the compartment stands: then the fore-and-aft sub-division letter establishes the section between main transverse bulkheads between which it lies; for example, 4D indicates the shaded part of fig .3-12 .
Okokuqala inani ledekhi lenza idekhi ethi ime indawo yokuhlala: baze oonobumba abancinci abalandelayo benze icandelo phakathi kwecandelo enqanaweni elingangeni manzi apho ikhoyo; umzekelo, u-4D ubonisa indawo esithiweyo wezasobe sesi- 3-12.