OUPV 6 Pack Exam Prep 2025
Questions and Answers
1 Part per million is oil pollution - ✔✔
Low Pressure - ✔✔Air rises near low pressure areas. As air rises, it cools and often
condenses
What is piloting? - ✔✔Piloting is the movement of a vessel by referring to landmarks,
aids to navigation, depth sounding and radio navigation.
What is dead reckoning? - ✔✔The process of navigating by advancing a known position
using course, speed, time and distance to be traveled. In other words, figuring out
where you will be at a certain time if you hold speed, time and course you plan to
travel.
DR Plot (Dead reckoning plot) - ✔✔A DR plot should be maintained at all times. It is
the best estimate of where the vessel should be at any given time.
Latitude and Longitude - ✔✔Marine navigation is based on a system of geographic
coordinates that are used to describe a specific location on a body of water. The best
known system and most widely used set of coordinates is latitude and longitude
system.
Nautical mile - ✔✔equals approximately 2000 yards or 1.15 statute miles.
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 1
,Distance on nautical charts is measured by? - ✔✔We use ONLY latitude to measure
distance on nautical charts.
True North - ✔✔Is different from magnetic north. The difference between them is called
Variation.
Mercator projection - ✔✔The type of projection most widely used in coastal navigation.
1 Min of latitude is equal to 1 mile everywhere - ✔✔LATITUDE SCALE ONLY that is
used for measuring distance.
Compass card - ✔✔Remains stationary and the vessel turns around the compass card.
Lubber Line - ✔✔The Lubber's line is a line or mark scribed on the compass card
housing to indicate the direction in which the boat is heading.
Variation - ✔✔The difference between true north and magnetic north.
On nautical charts, the variation for a given area is noted at the center of the compass
Rose. - ✔✔
What is Deviation? - ✔✔The compass error caused by magnetic forces within the vessel,
such as electronic equipment and ferrous metal objects.
The sum of variation and deviation are called? - ✔✔Compass error
National Ocean Service - ✔✔Part of NOAA and responsible for preparing nautical
charts
Mercator Chart - ✔✔Mercator chart projection is the most widely used projection is
marine navigation.
Small scale-Large Scale - ✔✔Small scale charts show a large area. Large scale chart
shows a small area.
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 2
, All heights given in feet above mean high water unless otherwise stated. - ✔✔
Vertical roman lettering used to table all conspicuous information that is not affected by
the tidal changes or current. - ✔✔
A dotted line around any symbol calls special attention to its hazardous nature. - ✔✔
Coast Guards local notice to mariners - ✔✔Charts are corrected using information
provided in the Coast Guard's local notice to mariners. They are published weekly by
geographic region.
Mariners are first warned by a marine broadcast local notice to mariners. - ✔✔
The dead reckoning (DR) track is the path or course the vessel is expected to follow. It is
plotted from a known position using courses and speeds through water. - ✔✔
USCG light list - ✔✔Published in seven volumes and contains lights and other aids to
navigation. This publication and the data contained within it is maintained and
published by the coast guard.
The National Ocean Service (NOS) - ✔✔Is part of NOAA and is responsible for
surveying the coast, harbors, and tidal estuaries of the U.S. and it's possessions. One of
their publications is the Coast Pilot.
The 3R Rule - ✔✔This means that when entering from seaward, keep the red aids to
starboard (right) side and green aids to port (left) side. In addition, each aid is
numbered, and these numbers increase as entering from seaward.
Safe Water Marks - ✔✔These aids are used to mark fairways, mid-channels, and
offshore approach points and have unobstructed water on all sides.
Ranges - ✔✔A range is a PAIR of aids to navigation, which when lined up with each
other, mark a channel center line.
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 3
Questions and Answers
1 Part per million is oil pollution - ✔✔
Low Pressure - ✔✔Air rises near low pressure areas. As air rises, it cools and often
condenses
What is piloting? - ✔✔Piloting is the movement of a vessel by referring to landmarks,
aids to navigation, depth sounding and radio navigation.
What is dead reckoning? - ✔✔The process of navigating by advancing a known position
using course, speed, time and distance to be traveled. In other words, figuring out
where you will be at a certain time if you hold speed, time and course you plan to
travel.
DR Plot (Dead reckoning plot) - ✔✔A DR plot should be maintained at all times. It is
the best estimate of where the vessel should be at any given time.
Latitude and Longitude - ✔✔Marine navigation is based on a system of geographic
coordinates that are used to describe a specific location on a body of water. The best
known system and most widely used set of coordinates is latitude and longitude
system.
Nautical mile - ✔✔equals approximately 2000 yards or 1.15 statute miles.
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 1
,Distance on nautical charts is measured by? - ✔✔We use ONLY latitude to measure
distance on nautical charts.
True North - ✔✔Is different from magnetic north. The difference between them is called
Variation.
Mercator projection - ✔✔The type of projection most widely used in coastal navigation.
1 Min of latitude is equal to 1 mile everywhere - ✔✔LATITUDE SCALE ONLY that is
used for measuring distance.
Compass card - ✔✔Remains stationary and the vessel turns around the compass card.
Lubber Line - ✔✔The Lubber's line is a line or mark scribed on the compass card
housing to indicate the direction in which the boat is heading.
Variation - ✔✔The difference between true north and magnetic north.
On nautical charts, the variation for a given area is noted at the center of the compass
Rose. - ✔✔
What is Deviation? - ✔✔The compass error caused by magnetic forces within the vessel,
such as electronic equipment and ferrous metal objects.
The sum of variation and deviation are called? - ✔✔Compass error
National Ocean Service - ✔✔Part of NOAA and responsible for preparing nautical
charts
Mercator Chart - ✔✔Mercator chart projection is the most widely used projection is
marine navigation.
Small scale-Large Scale - ✔✔Small scale charts show a large area. Large scale chart
shows a small area.
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 2
, All heights given in feet above mean high water unless otherwise stated. - ✔✔
Vertical roman lettering used to table all conspicuous information that is not affected by
the tidal changes or current. - ✔✔
A dotted line around any symbol calls special attention to its hazardous nature. - ✔✔
Coast Guards local notice to mariners - ✔✔Charts are corrected using information
provided in the Coast Guard's local notice to mariners. They are published weekly by
geographic region.
Mariners are first warned by a marine broadcast local notice to mariners. - ✔✔
The dead reckoning (DR) track is the path or course the vessel is expected to follow. It is
plotted from a known position using courses and speeds through water. - ✔✔
USCG light list - ✔✔Published in seven volumes and contains lights and other aids to
navigation. This publication and the data contained within it is maintained and
published by the coast guard.
The National Ocean Service (NOS) - ✔✔Is part of NOAA and is responsible for
surveying the coast, harbors, and tidal estuaries of the U.S. and it's possessions. One of
their publications is the Coast Pilot.
The 3R Rule - ✔✔This means that when entering from seaward, keep the red aids to
starboard (right) side and green aids to port (left) side. In addition, each aid is
numbered, and these numbers increase as entering from seaward.
Safe Water Marks - ✔✔These aids are used to mark fairways, mid-channels, and
offshore approach points and have unobstructed water on all sides.
Ranges - ✔✔A range is a PAIR of aids to navigation, which when lined up with each
other, mark a channel center line.
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 3
