Options for Improving the Safety of DUKW Type Amphibious Vessels (2021) / Chapter Skim
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Pages 57-68
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From page 57... ...
57 One way to improve vessel survivability is to limit the hazards that a vessel is likely to encounter during waterborne operations. Such limitations are already in place to some extent through restrictions that limit WWII DUKWs and Stretch Ducks to protected waters.
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58 OPTIONS FOR IMPROVING THE SAFETY OF DUKW TYPE AMPHIBIOUS VESSELS OPERATING AREAS AND CASUALTY EVENTS The operating areas of the Stretch Duck 7 and DUKW 34 created the conditions that made the vessels vulnerable to operator errors. Stretch Duck 7 took passengers on Table Rock Lake, created by a dam on the White River in the Ozark Mountains of southern Missouri.
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From page 59... ...
OPERATING AREAS 59 REGULATIONS AND NVIC 1-01 Operating areas for DUKWs are currently limited in their stability letters to either "protected waters" or "partially protected waters" (see Box 4-1)
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60 OPTIONS FOR IMPROVING THE SAFETY OF DUKW TYPE AMPHIBIOUS VESSELS the expertise of the OCMI. OCMIs base their decisions on current and past waterway use, marine casualty information, legal and regulatory standards, and stakeholder input from sources like local Harbor Safety Committees and regional or trade specific Safety Advisory Committees.
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From page 61... ...
OPERATING AREAS 61 The designation as a river or a lake, bay, or sound may not capture what makes an operating area higher or lower risk for DUKW operations. Many lakes, bays, and sounds are benign bodies of water that are generally calm and protected from large waves and strong winds.
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From page 62... ...
62 OPTIONS FOR IMPROVING THE SAFETY OF DUKW TYPE AMPHIBIOUS VESSELS or less and speeds in reverse are only two knots, according to the U.S. Army's DUKW Operations Manual.
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From page 63... ...
OPERATING AREAS 63 on water) , the anchor would restrain the DUKW from rising to the waves, increasing the likelihood of water coming over the bow.
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From page 64... ...
64 OPTIONS FOR IMPROVING THE SAFETY OF DUKW TYPE AMPHIBIOUS VESSELS of weather hazards based on historic weather data, vessel particulars, and waterway characteristics. The second approach leverages NWS's integrated severe weather alert system.
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From page 65... ...
OPERATING AREAS 65 compared to relying on the maximum wind and wave criteria listed in the COI, it will also provide a more objective standard for when it is safe to operate a DUKW. Predicting whether a forecasted severe weather event will create conditions that exceed the COI's permitted values is a difficult task, particularly for DUKW operating personnel who are not weather experts.
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From page 66... ...
66 OPTIONS FOR IMPROVING THE SAFETY OF DUKW TYPE AMPHIBIOUS VESSELS In addition to its commitment to education and outreach, NWS has worked with USCG in some areas of the country to provide decision support tools to help mariners and USCG officials make risk-based decisions regarding maritime operations. There is an opportunity for OCMIs who oversee DUKW operations to consult with their local NWS office on developing operating restrictions and decision support guides.
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From page 67... ...
OPERATING AREAS 67 • Proximity to available rescue craft • Availability of safe refuge locations (see Box 4-2 above) For severe weather, incorporating the alert system run by NWS into DUKW operating restrictions is a means to reduce the risk that DUKW operators will misjudge the severity of the weather or capabilities of their craft.
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