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Discuss Inland vs. International Rules of the Road
International Rules - for all vessels on the
HIGH SEAS and in CONNECTING WATERS
WIND on small
boats
Boat is moved in the direction of the wind
SEAS
on small boats
harder to handle steering
CURRENT on
small boats
CAUSES
DRIFT in direction of flow
PROPELLER
ACTION affects
small boat
handling
Causes boat to ROTATE and cause
FORWARD THRUST
SCREW
CURRENT
affects small
boat handling
PROPELLERS DRAW IN WATER FROM
EVERY DIRECTION AND AROUND THE
BLADES, PROVIDING A FORWARD
THRUST
SIDE FORCE
affects small
boat handling
Causes boat to MOVE SIDEWAYS
CAVITATION
affects small
boat handling
LOSS of EFFECTIVE THRUST and
propeller EFFICIENCY
RUDDER
ACTION
affects small
boat handling
pushes the stern and
bow in OPPOSITE DIRECTIONS
compass
errors:
Variation
DIFFERENCE between the value of TRUE
NORTH AND MAGNETIC NORTH.
compass
errors:
Deviation
Amount that the compass is deflected from
the MAGNETIC MERIDIAN because of the
effects of the SHIPS IRON.
Describe procedures to determine compass course on a chart.
compass course. : the course which a ship is
intended to travel
Define how to
determine safe
speed:
State of visibility
As visibility decreases, boats speed
should also decrease
Safe Speed- Rule 6
Define how to
determine safe
speed:
Traffic density
Alot of traffic density requires slower
speed to avoid collision
determine safe
speed:
Stopping distance
and turning ability
Faster speed increase stopping distance
required
Slow speed when making sharp turns so
that you dont overshoot your turn
Define how to
determine safe
speed:
Night
Decrease speed at night in order to
readily recognize other vessels and
buoys
Define how to determine safe speed: Wind, sea, and current
Wind, seas, and current increase the sea
state. More RPMS may be required to
fight resistance. More control is required
when mooring
Define how to determine safe speed: Limitations of the radar equipment
Limitations of radar requires slower
speed and lookouts to be more alert
Define how to determine safe speed: Effect on radar detection of the sea state, weather
Vessel speed should be reduced when
interference caused by sea state of
weather impairs the performance of the
radar
Define how to determine safe speed: Ice and other floating objects may not be detected by radar
requires slower speed and lookouts to
be more alert
Define Plan of
Intended
Movement (PIM)
The PLANNED ROUTE that a ship is TO
FOLLOW Must be approved by CO.
Define
Line of
Position
(LOP)
A line of bearing (direction) to a known object,
which a vessel is presumed to be located on at
some point.
Define
Dead
Reckoning
Determination of approx. position by advancing
a previous position for course and distance
only, without regard to other factors, such as,
wind, sea conditions and current
Define
Compass
Bearing
direction towards which you are headed, as
shown by a compass
Define
Relative
Bearing
Direction from the boat’s bow at 000°, measured
clockwise through 360°
Define Fix
A known point on Earth.
Discuss “IALA”
systems A and B
International Association of Lighthouse Authorities IALA System A: Asia, Africa, Europe o Green right returning • IALA Systems B: The Americas, and Japan.
Discuss the
following element
of a Contact
Report: Bearing
Always report contacts in relative
bearings.
Given in 3 digits, spoken digit by digit
Discuss the following element of a Contact Report: Position Angle
Report position angle on all aircraft.
Given in 1 or 2 digits, spoken as whole
number.
Discuss the following element of a Contact Report: Target Angle
Report target angle on all ships.
Given in 3 digits, spoken digit by digit
Discuss the following element of a Contact Report: Range Estimation
horizion is the only readily
available reference point
Discuss the following element of a Contact Report: Speed Estimation
readily visible aid in estimating speed
is a ship’s bow wave and stern wake
Define the actions to be taken by the Give Way and Stand-on vessels in a HEAD ON situation
Head-on Situation - (a) When two vessels
are heading head on towards each other,
should pass port to port
Define the actions to be taken by the Give Way and Stand-on vessels in a CROSSING situation
The vessel which has the other on her own
starboard side shall keep out of the way
and avoid crossing ahead if circumstances
permit.
Define High
Tide
MAXIMUM water height resulting from the
RISING tide
Define Low Tide
MINIMUM water height resulting from the
OUTGOING tide.