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S s s-band radar safe speed safety contour safety depth SafetyNET Sag Saildocs sailing chart Sailing Directions sailing vessel sailings Same Name sandstorm Santa Ana SAR Sarma SART (search and rescue transponder) sastrugi satellite photos Satnav saturation Saturn scale band scale minimum (SCAMIN) scan scarf cloud scattered showers scattered thunderstorms scenario scud sea sea anchor sea breeze sea buoy sea clutter sea fog sea ice sea mile sea room Sea Shadow sea state sea state sea state analysis sea surface temperature sea-ice nomenclature sea-level pressure seaplane seaward seawater seawater temperature seclusion second-year ice secondary low Secretary sector light seiche seismic sea wave Selected Worldwide Marine Weather Broadcasts Selenga semidiameter semidiurnal pressure variation semidiurnal tide SENC sensitivity time control separation line separation zone separation zone September equinox set setting angle seven seas seven-eighths rule seven-tenths rule seven-thirds rule Sextant sextant Sextant arc Sextant Height Sextant Piloting Sextant Sight Shadow shamal sharki shear line Shelonnik Shift of Centre of Gravity Ship Centre of Gravity ship weather routing ship's domain Shipping Lanes ship´s heading line SHL Shooting a Star shore polynya short blast short sea shower shuga Siberian High Side Error side lobes side-lobe interference sidelights Sidereal Hour Angle Sight Sight Reduction Sight Reduction Tables significant wave height sikussak single sideband sirocco SITOR six-hour observation six-minute rule sky map skyhook balloon skylight Slack Water sleet slewing sling psychrometer slush smack small area plotting sheet small area plotting sheet small craft small craft advisory small floe small fracture small ice cake small ice field small iceberg SMG smog smokes smooth sea snark snow snow barchan snow blink snow flurry snow grains snow pellets snow storm snow-covered ice snowdrift snowflake soft hail SOG solar wind solstice Solstices sou'easter sou'wester sound sound sound buoy sounding sounding datum sounding lead Source Book source region south frigid zone South Pacific Convergence Zone (SPCZ) southeaster southerly buster Southern Oscillation Index southern stars southwest monsoon southwester special circumstances special flashing light special observation Special Warnings specific gravity specific heat specific humidity speed speed speed line speed made good (SMG) speed of advance speed of relative motion speed of relative movement speed over ground speed triangle spot size spring tide squall squall cloud squall days squall line squally squamish SRM SST St. Elmo's fire St. Helena High St. Helena High St. Helena High St. Helena High stability stabilized radar Stable Equilibrium stand stand-by mode stand-on vessel standard atmosphere standard atmospheric pressure standard barometer standard meridian Standard Time standard time standing floe standing wave Star Finder star names star path starboard tack static stability station model station pressure stationary front statute mile STC steam fog Stellarium stern target sternlight Stiff Vessel sting in the scorpion's tail storm storm avoidance storm avoidance storm center storm surge storm tide storm track storm wave stranded ice strata stratiform stratiformis stratocumulus stratocumulus castellanus stratocumulus floccus stratocumulus lenticularis stratocumulus mammatus stratocumulus opacus stratocumulus perlucidus stratocumulus radiatus stratocumulus stratiformis stratocumulus translucidus stratocumulus undulatus stratocumulus vesperalis stratosphere stratus stratus fractus stratus nebulosus stratus opacus stratus translucidus stratus undulatus streamline strip strong breeze strong gale strong wind warning STW (speed through the water) sublimation subordinate station subrefraction subsidence subtropical Highs sudden ionospheric disturbances sudestada suestado sugarloaf sea sumatra summer summer solstice Summer Triangle Summer Triangle sun compass sun cross sun dog Sun Line sun pillar Sunline Sunrise Sunset sunspot sunstone super refraction supercell supersaturation surface analysis surface boundary layer surface chart surface front surface observation sustained wind sweep swell swinging ship Sydney-Hobart Race synopsis synoptic chart synoptic code synoptic surface chart synoptic times synthetic aperature radar system electronic navigation chart systematic observation syzygy

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