Proceedings Of The Marine

FALL 2011

Proceedings magazine is a communication tool for the Coast Guard's Marine Safety & Security Council. Each quarterly magazine focuses on a specific theme of interest to the marine industry.

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mast, was constructed of six-inch square steel pipe of 3 8 LQFK ZDOO WKLFNQHVV DQG ZDV ÀWWHG ZLWK D ODGGHU and safety hoops. When the vessel sank six months later, it carried nearly all of its newly installed appa- ratus except for the scallop dredge. ,Q VKRUW WKH YHVVHO·V PRGLÀFDWLRQV IRU VFDOORS GUHGJ- LQJ ZHUH VLJQLÀFDQW &OHDUO\ WKH PRGLÀFDWLRQV DGGHG a considerable amount of surface area as well as addi- tional weight to the vessel. Stability Requirements The investigation grew somewhat more complicated around the issue of the requirement of stability letters IRU FRPPHUFLDO ÀVKLQJ YHVVHOV DV WKH YHVVHO·V VLQN- LQJ³DV ZHOO DV GDWD RQ WKH VKLS·V VLJQLÀFDQW SK\VLFDO PRGLÀFDWLRQV WKH SUHYLRXV VXPPHU³LQDGYHUWHQWO\ shed light on the possible need to amend portions of &)5 3DUW ZKLFK FDOOV IRU FRPPHUFLDO ÀVK- ing vessels built after 1991 and 79 feet and greater in length to perform stability tests and provide a letter RI YHULÀFDWLRQ SULRU WR RSHUDWLQJ As described in the investigation report: "While the vessel did undergo a stability evaluation in accor- GDQFH ZLWK &RDVW *XDUG UHJXODWLRQV DV D UHTXLUHPHQW of the vessel's insurance underwriters, the evaluation was only for day scalloping. The vessel initially failed the intact stability criteria, but passed for day scal- ORSLQJ RSHUDWLRQV RQO\ LI WKH YHVVHO ZDV FRQÀJXUHG and operated in accordance with the naval architect's restrictions." The naval architect revealed that in sta- bility test calculations performed prior to the vessel PRGLÀFDWLRQV ´WKH YHVVHO ZRXOG QRW PHHW FXUUHQW intact stability standards if they were applicable." The naval architect advised the vessel owner that the vessel would meet stability criteria for operating as a day scalloper, provided the vessel made certain PRGLÀFDWLRQV DQG DELGHG E\ FHUWDLQ RSHUDWLQJ UHVWULF- WLRQV 2Q -XO\ WKH QDYDO DUFKLWHFW LVVXHG D stability letter applicable only while the vessel was in service as a day boat scallop dragger. Recommendations 7KHUH ZHUH ÀYH RIÀFLDO UHFRPPHQGDWLRQV DV D UHVXOW RI WKH LQYHVWLJDWLRQ LQWR WKH VLQNLQJ RI WKH ÀVKLQJ YHV- VHO 7KH ÀUVW GHDOW ZLWK WKH UHODWLYHO\ XUJHQW PDWWHU RI stability requirements, while three other recommen- dations dealt with gaining a better understanding of ice accretion, providing for additional allowances from a geographical standpoint, and addressing fun- damental threats that ice accretion poses to the safety of mariners in terms of access to safety equipment 66 Proceedings Fall 2011 DERDUG D YHVVHO 7KH ÀQDO UHFRPPHQGDWLRQ ZKLOH QRW a factor in the sinking of the vessel, was a recommen- GDWLRQ WR UHYLHZ VWDELOLW\ IRUPXODV LQ &)5 3DUW for accuracy. 7KH ÀUVW UHFRPPHQGDWLRQ E\ LQYHVWLJDWRUV FDOOHG IRU WKH &RDVW *XDUG WR UH HYDOXDWH WKH QHHG WR DPHQG DSSOLFDELOLW\ UHTXLUHPHQWV LQ &)5 IHHW DQG JUHDWHU LQ OHQJWK WR WR ORZHU WKH VWDELOLW\ UHTXLUHPHQWV IRU FRPPHUFLDO ÀVKLQJ YHV- VHOV IURP IHHW DQG JUHDWHU LQ OHQJWK 7KH &RDVW *XDUG FRQFXUUHG ZLWK the recommendation, stating: "We have indicated our intention to establish stability VWDQGDUGV IRU FRPPHUFLDO ÀVKLQJ YHVVHOV OHVV WKDQ IHHW LQ OHQJWK LQ WKH )HGHUDO 5HJLVWHU RQ VHYHUDO RFFD- sions leading up to our current regulatory project…" The next two recommendations were more techni- cal in nature, and dealt with calls to re-evaluate the weight of assumed ice as well as to re-evaluate lati- tude as factors in stability calculations, which ulti- mately impact regulatory and stability restrictions in severe weather. In short, the case being made by investigators involved assumptions about ice accu- PXODWLRQ DQG WKDW H[WUHPH LFLQJ³RU KLJKHU ÀJXUHV in height and weight for ice—occurs slightly farther south than previously believed. The second recom- mendation included the following: ´« WKDW WKH &RDVW *XDUG UH HYDOXDWH WKH ZHLJKW RI assumed ice on each surface above the waterline for DOO ÀVKLQJ YHVVHOV DV VSHFLÀHG LQ &)5 E $GGLWLRQDOO\ UHFRPPHQG WKDW WKH &RDVW *XDUG UH evaluate the weight of assumed ice on each surface DERYH WKH ZDWHUOLQH IRU ÀVKLQJ YHVVHOV RSHUDWLQJ QRUWK RI ODWLWXGH RU VRXWK RI 6RXWK ODWLWXGH DV VSHFLÀHG LQ GHJUHHV EXW VRXWK RI GHJUHHV · 1RUWK GHJUHHV EXW QRUWK RI &)5 F µ Similarly, the investigator's third recommendation stated that: ´« WKH &RDVW *XDUG UH HYDOXDWH ODWLWXGHV VSHFLÀHG LQ &)5 WKDW VWDWH WKH ZHLJKW RI DVVXPHG LFH KDV WR EH D IDFWRU LQ VWDELOLW\ FDOFXODWLRQV ZKHQ D ÀVK- LQJ YHVVHO RSHUDWHV QRUWK RI GHJUHHV 1RUWK ODWLWXGH 7KH FDVH KLJKOLJKWV WKH IDFW WKDW VLJQLÀFDQW LFH DFFX- PXODWLRQ RFFXUV VRXWK RI GHJUHHV 1RUWK ODWLWXGH µ 7KH &RDVW *XDUG FRQFXUUHG ZLWK ERWK UHFRPPHQ- dations. With regard to the value used for weight of DVVXPHG LFH WKH &RPPDQGDQW·V DFWLRQ VDLG WKH\ DUH consistent with those used for all vessel types inter- www.uscg.mil/proceedings GHJUHHV /

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