在船上制作应急舵时，所能使 用的材料大抵限于吊杆（Derrick Boom），帐蓬圆材（Awning Spar），舱口盖板 （Hatch Board），铁板及铁棒等，其制作方法也甚为为简单，但其强度必须能 耐波浪之阻力与...
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derrick boom rest 吊杆托架
light derrick boom 轻型吊杆
slewing angle of derrick boom 吊杆最大偏角
two derrick boom cargo handling 联杆吊货法
inboard derrick boom 舱口吊杆
derrick boom for dipper [机] 铲斗吊杆
Derrick boom heel fittings 悬臂起重机吊杆底脚装置
heavy derrick boom 重型吊杆重吊杆
Chief Officer: The derrick boom on hatch No. 1 is not safe, and it may be harmful for navigation. Second, could you check it tomorrow?
大副： 1舱吊杆不安全，可能影响安全航行，二副，你明天检查一下。
The opening hatch cover method also not to be satisfied that using the warping head of cargo gear not through derrick boom open the hatch cover because using derrick boom is not safe.
开舱盖的方法不令人满意，起货设备传动轮弯头在开舱时不穿过吊杆，原因为使用吊杆不安全。
The derrick boom rests to be renewed as Chief Officer requirement because the rests are too high and too thin and not safety for navigation. Also the deformed positions to be corrected.
吊杆支座应按大副要求换新，因为支座太高、太薄不能满足安全航行，同时需纠正变形。
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