Wave observations at night or in low visibility
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Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC.1/Circular.1329 – Guidelines for Uniform Operating Limitations of High-Speed Craft – (11 June 2009) - Annex – Guidelines for Uniform Operating Limitations of High-Speed Craft - Appendix 1 – Visual Estimation of Significant Wave Height1 - Wave observations at night or in low visibility

Wave observations at night or in low visibility

  5 Under these conditions, the most that the observer can normally hope to record is direction and an estimate of height, or perhaps direction only, which would at least indicate the presence of waves. Such observations might be of considerable value in tropical waters in the hurricane season. It is only on very bright nights that the observation of period would be practicable.

Parent topic: Appendix 1 – Visual Estimation of Significant Wave Height footnote
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