Sea school Navigation General

The term Slackwater during a title change means
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Terms in this set (100)
When plotting a voyage you shouldNever rely on a floating buoy to maintain its exact positionThe difference in height between low and high tide is referred to as theRange of tideFrom Seaword IALA region B red and green horizontally band buoys refer toDo preferred channelDetermining the height of land features on most charts unless otherwise stated the reference datum isMean high waterRed or green lights may appear onHorizontally banded buoysThe depth of the water on a chart is theVertical distance from the charge sounding data him to the ocean bottomA north hemisphere win which shifts in a counter clockwise motion is called aBacking windA vessels's position acquired by using the last three or more bearings is called aFixMean lower low water (MLLW) is the reference plane used forSounding on the US East and West CoastHey single line of position combined with a dead reckoning position results in aEstimated positionThe sun and moon align twice each month what type of tides can be expectedSpringA buoy mark with a composite group flashing light indicates aPreferred channelOn the US East and West Coast charted depths are taken fromMean lower low waterA weather forecast expects a backing wind in the north hemisphere this would indicate it willShift in a counterclockwise mannerWhat type of tides occur when the sun and moon are at right angles 90° to each otherNeapIf lighted preferred channel buoys will show aComposite group flashing 2+ 1 red or green lightA weather forecast expects a veering wind. In the northern hemisphere this would indicate that it willShift in a clockwise mannerThe length of a lunar day is24 hours and 50 minutes / about 50 minutes longer than a solar dayA lighted preferred channel buoy may show aComposite group flashing lightTo determine the depth of the water what should you apply to your depth finder readingAdd the draft of the vesselA local wind which occurs especially during the day owing to the land heating up is aSeabreezeA location that is acquired by using three or more intersecting lines of position taking at nearly the same time isFixFlashing green lights may appear onHorizontally banded buoysWind resulting from the cooling of a land mass more quickly especially at night than adjacent water is aLand breezeThe term "Mean high water" is the average height ofAll Highwater waters over a 19 year periodWhich term best describes an accurate position which is not based on any prior positionFixA safe water marker me exhibitVertical stripes and a white lightMean low-water is an average height ofAll low-water over a 19 year periodA position obtain using only the vessels course and speed from a known position is aDead reckoning positionA vertically striped aid to navigation buoy may beLights with a white lightThe path that a vessel is expected to follow is called theTrack lineWhen planning a DR you should always start from anKnown positionWhat best describes a safe water mark painted and lightedRed and white stripes with a Morse (A) light 0—A lighted buoy with a red spherical top mark indicatesA safe water buoyHow many high tide usually occur each day on the East Coast of the United States2Which IALA Region B aid to navigational mark may only be lettered and not numberedA spherical buoyThe scale on a nautical chart is given as 1 : 80,000. This means the representative faction is1 inch on the chart equals 80,000 inches on the earths surfaceNun buoys may show onlyFlashing red lightsA description on a nautical chart noting a "Racon"indicatesRadar transponder beaconLegends printed on a nautical chart in capital letters show that the associated landmark isConspicuousA non-lateral aid with a red spherical top mark assists in identifying which ATONA Safe water markWhen there are 2 high and 2 low tides in a 24 hour. This is calledSemidiurnalYou are inbound on course for the harbor inside a white light showing a Morse (A) 0— to port for safety you shouldLeave the buoy to portFrom Seaword you enter the main channel the buoy numbers on the Starbord side of your vessel shouldIncrease and the boys are redIn IALA Region B lateral system CAN buoy isGreenThe best term to describe the difference between the hights of low and high tide is theRangeNeap tides occur when the sun and moon areAt right angles to each otherA mid channel buoy if lighted will show aFixed green light, alternating light, red light, answer is none of the above use buoys sheet to determine right answerSpring tides occur when the sun and moon areNearly in line with the earthYou are outbound to the sea in a Buoyed channel and observe a quick flashing green light on a buoy ahead of you. In IALA Region B you should leave the buoyTo StarbordYour vessel changes heading to starboard the compass card in a magnetic compass willRemain aligned with the compass northWhen entering a vessel traffic separation zone from sea a lighted buoy to be kept to starboard shall have aRed lightThe symbol which appears beside a light on a chart reads "Gp Fl G (2) 12 sec 160 ft 19M" which characteristic of light color does it possessIt has a green lightWhich symbol represents a warm frontLine with red half circles on one sideWhen entering from sea in US waters what buoy should be left to portOdd numbersLateral buoys which only mark the left or right side of a channel shall NEVER exhibit a light characteristic ofComposite group flashing 2+1Which chart projection is most suited for coastal navigationMercatorTo make a correction to your compass course (psc) you would find the variation on a Mercator chartOn the compass roseA conical buoy (referred to as a nun buoy) willBe red in color and even numbedsThe instrument that reads atmospheric pressure differences and changes isBarometerPrior to reading and aneroid barometer you should tap the face lightly with your finger toBring the pointer to its true positionA cold front symbol on the weather chart is represented byLine with blue trianglesFixed yellow lights me appear onSpecial purpose buoysThe weather forecast states that occluded front will occur what is the weather chart symbolLine with purple half circles and trianglesWhich buoy listed below could be used to mark special anchorageYellow buoy BLocal notice to mariners report dredging operations are underway in your facility which buoy indicates the dredging areaYellow buoyThe weather forecast calls for a stationary front which weather charge symbol represents thisLine with red circles on one side and blue triangles on the otherA white buoy with an orange colored rectangle on it is used to indicateGeneral informationThe chart projection most widely used for navigation is TheMercatorAn occluded front is represented by which color linePurpleThe description Racon along side an illustration on a chart would mean aRadar transponder beaconA line of position made by sighting two charted objects in a direct line is called aRange lineChart legends printed in capital letters shows that the associated landmark isConspicuousTo measure the distance on a Mercator chart between two way points which tool would you use to measure the distanceDividersDistance along a track line is measured on a Mercator chart by using theLatitude scale nearest to the track lineIf lighted white lights may be found onInformational and regulatory buoysConspicuous landmarks on a chart legend are printed inCapital lettersInformational and regulatory buoys areWhite with orange geometric shapesThe rise and fall of the ocean surface due to a distance storm is known asSwellIsolated danger buoys on IA LA Region B waterways are printed with alternatingRed and black bandsNormally weather patterns in the US generally move fromWest to eastWhich federal agency maintains age to navigation in the USCoast guardUnited States Coast Guard is responsible for publishing theLight listWhat critical source of information is to be used in correcting charts and maintaining them up-to-dateLocal notice to marinersThe source to find the number of a chart for a certain geographic areaCatalog of nautical chartsA weekly source for mariner warnings for serious defects or important changes to aids to navigation are publishedLocal notice to marinersThe US Coast Pilot (volumes I thru IX) is published by which US government agencyNational Ocean serviceLight list that are published for US coastal waters areCorrected only to the date of publication and must be updated there afterCompass "deviation" is caused by theEarths magnetic fieldMagnetic north varies from true north because ofVariation