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quired onboard documentation. VCG (high GM) from the Reg. 27 calcu- lations at the deep waterline must still be

In compliance with classi? cation used. In essence this stipulates that since society recommendations, the “Bulk ships cannot have cargo with a VCG

Carrier DDS” was put to use, which in- higher than the homogeneous cargo hold, cludes a direct damage stability simple they are prevented from having any sig- run through damage cases for each bulk ni? cant deckload at the deep waterline. cargo hold to verify compliance with Depending on the Partial Draft Req. GM

Reg. 4 damage stability, thereby meeting to meet the B-1 damage requirements, the ICLL Reg. 27 stability standard. This ships can get progressively more deck- procedure has been implemented in Car- load at lighter and lighter drafts.

goMaxTM and when required done si- Class has conceded that the Reg. 27 multaneously with the S17 hold ? ooded calculations might be easily met for some strength calculations. ships, and the ship in question could meet the ICLL damage stability criteria

Bulk Carriers with Type B-60 with a cargo VCG even higher than the

Freeboards and Deckloads homogeneous fully loaded holds. In this

Since bulk carriers with deckloads can case class states: have a VCG even higher than the con- servative 100% full homogeneous CG “Redoing the ICLL Reg. 27 calcula- required by ICLL Reg. 27, these dam- tion with a lower GM (higher VCG) age requirements are considered to be than required by the standard initial inadequate and need to be supplemented condition in order to use this lower by the SOLAS B-1 probabilistic require- GM for the subdivision draft GM in ments, see IACS LL65. the probabilistic calculations is an ac-

The B-1 probabilistic requirements are ceptable solution.” generally considered less conservative than the Reg. 27 deterministic require- ments. Nonetheless, attention needs to be paid to provision 4 of IACS LL65, which states: “The KG used for demonstrating com-

The Author pliance with the criteria in 3a (the

ICLL Reg. 27 calculations) shall be

Hendrik Bruhns, Naval Architect, Presi- the same as that used for the criteria dent of Herbert-ABS Software Solutions in 3b (probabilistic B-1 calculations)

LLC. Previously he headed the Stability at the subdivision loadline.”

Department of Germanischer Lloyd and has participated in and chaired numer-

This means that even if the B-1 calcu- ous Committees at IMO. lations with a higher VCG (lower Req. e: [email protected]

GM) are met, the relatively conservative www.marinelink.com 21

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