What parameter must be verified prior to authorizing enclosed space entry for practical watchkeeping and logbook documentation related to General Ship Knowledge?
Direct Answer
Option D: Atmospheric oxygen level at 20.9% and zero toxic/flammable gas concentration
SOLAS Regulation XI-1/7 mandates the carriage of portable atmosphere testing instruments. Before entering an enclosed space, the atmosphere must be verified as having 20.9% oxygen and being free from toxic or flammable gases. This is critical to prevent asphyxiation and explosion, as per established safety management procedures.
All Options
Detailed Explanation & Context
SOLAS Regulation XI-1/7 mandates the carriage of portable atmosphere testing instruments. Before entering an enclosed space, the atmosphere must be verified as having 20.9% oxygen and being free from toxic or flammable gases. This is critical to prevent asphyxiation and explosion, as per established safety management procedures.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • General Ship Knowledge (GSK).
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