OUPV NAVIGATION GENERAL STUDY GUIDE|UPDATED&VERIFIED|100% SOLVED|GUARANTEED SUCCESS

"Slack Water" During a tidal change means Little or no movement of water When entering a channel from the sea and decide to check your compass heading you steer on a pair of range lights and find the upper light is in line with the lower light, You should Maintain your current course You observe a buoy mark having Green and Red horizontal bands it will have a light characteristic of Composite group flashing (2+1) The direction of the earth's surface wind is Deflected by the earth's rotation (Coriolis Effect) Your vessel's position should be plotted using the bearing of Fixed known objects on shore Which buoy may be lettered and NOT numbered Preferred Channel Buoy Spring tides will produce Higher highs and lower lows You must assume when using a buoy as an aid to navigation The buoy may not be in the charted position The "Local Notice to Mariners" provides corrections of local nature to charts and is published how often Weekly Term "Tide" Vertical movement of the water When plotting a voyage, You should Never rely on floating buoy to maintain its exact position The difference of height between low and high tide is referred to as the Range of tide From seaward the IALA Region B red and green horizontally banded buoys refer to Preferred Channels determining the height of land features on most charts unless otherwise stated the "Reference datum" is Mean High water Red or Green lights may appear on Horizontally Banded Buoys The depth of the water on a chart is the Vertical distance from the chart sounding datum to the ocean bottom North Hemisphere wind which shifts in a counter clockwise motion is called Backing wind A vessel's position acquired by using at least three or more bearings are called a Fix Mean lower low water (MILLW) is the reference plane used for Sounding on the U.S East and West coast a single line of position combined with a dead reckoning position results in a Estimated position The sun and moon alight twice each month what type of tides can be expected Spring A buoy mark with composite group flashing light indicates a Preferred channel On the U.S East and West coasts charted depth are taken from Mean Lower Low Water A weather forecast expects a "Backing" wind. In the northern hemisphere, this would indicate that it will Shift in a counter clockwise manner What type of tides occur when the sun and moon are at right angles to each other Neap If lighted preferred channel buoy will show a Composite Group Flashing (2+1) Red or Green light A weather forecast expects a "Veering" wind, In the Northern Hemisphere, This would indicate that it will Shift in a clockwise manner The length of a lunar day is About 50 minutes longer than the solar day A lighted preferred channel buoy may show a composite Group Flashing light To determine the depth if the water, What should you apply to your depth finding reading add the Draft of the vessel A local wind which occurs especially during the day owing to the land heating up is a Sea Breeze a location that is acquired by using three or more intersecting lines of position taken at nearly the same time is A Fix Flashing Green lights may appear on Horizontally Banded Buoys Wind resulting from the cooling of a land mass more quickly especially at night than adjacent water is a Land Breeze The Term "Mean High Water" All High Waters over a 19 year period A safe water mark may exhibit vertical Stripes and A white light Mean low Water is an average height of All low water over a 19 year period A position obtained using only the vessel's course and speed from a known position is a dead Reckoning Position A vertically striped aid to navigation buoy may be Lighted with a White light The path that a vessel is expected to follow is called the Track Line When plotting a DR, You should always start from a Known Position What best describes a safe watermark painted and lighted Red and White stripes with a Morse (A) Light (Dot)(Dash) A lighted buoy with a red spherical top mark indicates A safe water Buoy