Diving Air Standards

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Offshore Commercial Diving

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COMMERCIAL DIVER SUPPORT INTL

COMMERCIAL DIVER OUTFITTING & SUPPORT SPECIALIST CENTER | EST 1979

World Sea Condition Reporting Standards

  

SEA STATE CHART
SEA STATE Description Wind Force* Wind Description Wind (knots) Wind Velocity (knots) Average Wave Height (ft)

0

 Sea Like A Mirror. 0 Calm <1 0 0

0

 Ripples With The Appearance Of Scales Are Formed, But Without Foam Crests 1 Light Air 5-3 2 0.05

1

 Small Wavelets still short but more pronounced; crests have a glassy appearance but do not break 2 Light Breeze 4-6 5 0.18

2

 Large Wavelets, Crests Begin To Break.  Foam Of Glassy Appearance, Perhaps Scattered Whitecaps 4 Moderate Breeze 15-16 8.5-10 0.6-0.88

3

 Small Waves, Becoming Longer; Fairly Frequent Whitecaps 4 Moderate Breeze 15-16 12-16 1.4-2.9

4

 Moderate Waves, taking a more pronounced long form; many whitecaps are formed. Chance of some spray 5 Fresh Breeze 17-21 18-20 3.8-5.0

5

 Large waves begin to form; white foam crests are more extensive everywhere. Some Spray 6 Strong Breeze 22-27 22-26 6.4-9.6

6

 Sea heaps up and white foam from breaking waves begins to be blown in streaks along the direction of the wind. Spin drifts begins 7 Moderate Gale 28-33 28-32 11-16

7

 Moderately high waves of greater length; edges of crests break into spin drifts. The foam is blown in well marked streaks along the direction of the wind. Spray affects visibility 8 Fresh Gale 34-40 34-40 19-28

8

 High waves.  Dense Streaks of foam along the direction of the wind. Sea begins to roll. Viability affected. 9 STORM GALE 45-47 45-47 31-40

9

 Very High Waves With Long Overhanging Crests.  Foam is in great patches and is blown in dense white streaks along the direction of the wind.  The surface of the sea takes on a white appearance.  The rolling of the sea becomes heavy and shock-like.  Visibility Is Affected. 10 WHOLE GALE 48 48 44-59
Exceptional High Waves.  The sea is completely covered with long white patches of foam along the direction of the wind. Everywhere the edges of the waves crests are blown into froth.  Visibility Seriously Affected 11 STORM 56-63 56-63 64-73
Air Filled With Foam And Spray.  Sea Completely White With Driving Spray.  Visibility Seriously Affected 12 HURRICANE 64-71 >64 >80

We Recommend Using Accurate Instrumentation To Determined And Monitor Wind Speed

Atmospheric Data Centers   JETSET Handheld Weather Instumentation For Flying

Know The Conditions --- At Your Specific Location, Now!

Use The Technology Wisely ----- By Knowing The Measurement, And Relating It To Actual Personal Feeling, And Immediate Experiences, One Can Make A More Informed Decision In The Future, Based On Various Environment Condition Reports, Warnings, And The New Gained Personal Knowledge.

This Is Not A Consumer Gadget Toy!

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