Partial Load Line Draught (dP)
“Partial load line draught (dP)” is the light ship draught plus 60% of the difference between the light ship draught and the load line draught dS. The partial load line draught (dP) shall be measured in metres. <Annex 1, regulation 12A>.
Source: Resolution MEPC.141(54), amendments to the Annex of the Protocol of 1978 relating to the International Convention for the Prevention of Pollution from Ships, 1973 (Amendments to regulation 1, addition to regulation 12A, consequential amendments to the IOPP Certificate and amendments to regulation 21 of the revised Annex I of MARPOL 73/78), 24 March 2006, International Maritime Organization. Legislation