Deck Logbook Reference: Wind, Sea, and Weather Conditions
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Özgür ÖZÇELİK
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📅 04 Oct 2025
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👁️ 389 views
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👍 2 likes
Deck Logbook Reference: Wind, Sea, and Weather Condition Codes
Introduction
Deck logbooks require standardized meteorological observations for safety and reporting. The tables below compile the practical codes used for wind, sea state, visibility, sky condition, and wind direction.
Force
Name
Knots
Sea Condition
0
Calm
<1
Sea like a mirror
1
Light Air
1–3
Ripples, no foam
2
Light Breeze
4–6
Small wavelets
3
Gentle Breeze
7–10
Large wavelets
4
Moderate Breeze
11–16
Small waves, whitecaps
5
Fresh Breeze
17–21
Moderate wa...
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