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| S | D | Sea Conditions -indicators | B | W | Recomendations |
| 0-1 | Calm | Sea smooth and mirror like. Smoke rises verticaly | 0 | - | |
| 1-3 | Light air | Scale like ripples without foam crests. Smoke indicates direction | 1 | 1/2 | |
| 4-6 | Light breeze | Small short wavelets; crests have a glassy appearance and do not break. Tree leaves start moving | 2 | 1/2 | |
| 7-10 | Gentle breeze | Large wavelets; some crests beging to break, foam of a glassy appearance, occasional white foam crests. | 3 | 2 | |
| 11-16 | Moderate breeze | Small waves, becoming longer fairly frequent white foam crests. Dust swirls and small branches bend. bending. | 4 | 4 | |
| 17-21 | Fresh breeze | Moderate waves, taking a more pronounced long form , many white foam crests with some spray. | 5 | 6 | First reef |
| 22-27 | Strong breeze | Large waves begin to form , white foam crests more everywhere with some spray.Wind whistles. | 6 | 10 | Small craft consider shelter |
| 28-33 | Near gale |
Seaheaps up and white foam from breaking waves begins to be blown in the direction of the wind. spindrif begins. | 7 | 14 | In harbor. Experienced offshore 2 nd or 3 reef, small jib |
| 34-40 | Gale | Moderat high waves, of greater length, edges of crests break into spindrif. foam is blown in well marked streaks with direction of wind. | 8 | 18 | Heavy going. Strong small jib, deepest reefs. CONSIDER channel entry BREAKER RISK |
| 41-47 | Strong gale |
High waves, desne streaks of foamwith direction of wind.crests of waves begin to toppletumble and roll with spray reducing visability. | 9 | 23 | Becoming very dangerous. Your heading is a important factor |
| 48-55 | Storm | Very high waves with long overhanging crests. Resulting foam is blown in dense white streaks with direction oif wind.the sea surface appears white and tumbling becomes heavy and with shocks. visibility is reduced. | 10 | 29 | You are in it now. Storm strategy # see heavy weather |
| 56-63 | Violent Storm | Exceptionaly high waves that may obscrue small to medium sized ships. Sea completely covered in foam blown in wind direction. Edges of wave crests blown into froth. | 11 | 37 | # see heavy weather |
| 64-71 | Huricane | Air is filled with foam and spray. Sea completly white with driving spray, visibility difficult. | 12 | 45 | # see heavy weather & huricane survival |