MGN
166 - What are the Four Elements to a Passage Plan?
Appraisal
Planning
Execution
Monitoring
It
you remember the word "PEAM" this will help you think
about the 4 stages
Appraisal,
what is this?
When you gather as much safety and navigation information
to give you a safe voyage
What
type of information does this involve?
The tides
Tidal streams
Under-keel allowances
Information from pilot books/sailing directions
Chart dangers (rocks, shallow water oil-rigs etc.)
Traffic schemes
Weather information (shipping forecasts)
Possible areas of restricted visibility
Any areas, which would involve an area of high traffic density
Planning,
what is this?
Planning out the intended voyage, using all the information
from Appraisal
What
have you to do to make a plan of your voyage?
Plot the intended voyage making sure it is safe, and that the
plan has been checked out by the master of the vessel, use way
points, parallel indexing , courses, distance to steam on each
leg, and by using all the information that you Appraised
Execution,
what is this?
The master should find out how long his intended voyage
should take, making sure he has enough water and fuel for the
voyage
He should take into account any weather conditions expected
on the voyage
Any areas of high traffic density that would make him deviate
from his course (he should if possible make a plan to keep well
clear of these areas)
Monitoring,
what is this?
This is the act of checking your position often on a chart
and that you remain in a safe distance from any danger areas
(land)
Parallel Indexing should be used when you are alongside any
hazards to maintain a safe distance
What
is Parallel Indexing?
This is done by using your radar and V.R.M. (Variable Range
Marker) and putting a distance on to it , as long as this distance
is not breached, then your vessel should be in safe water
What
is the purpose of Parallel Indexing?
To make sure your vessel is a safe distance away from any
navigation hazards
How
do you parallel index using radar?
By using your heading marker and slide it over towards the
side that has the obstruction and using your V.R.M. and measuring
the distance you need and put the heading marker onto the V.R.M.
What
would you do if you had to parallel index off a point of land
at 2 miles but the radar says your 1.7 miles from the point
of land?
Alter off the land until you where 2 miles from the point
of land, never breech what distance you had to keep off an obstruction
M.C.A.
Oral exam Questions
(Q)
How would you make the actual passage plan going from Aberdeen
to the west side of Shetland?
(a)
By putting way points so you can parallel index off the points
of lands before and when joining a new course taking into account
the strong tides at the Pentland Firth and the chances of meeting
small inshore traffic
(Q)
What distance would you parallel index off the land or any obstacles
that's in your passage plan?
(a)
at least 2 miles depending on the depth of water at that obstacle
and any dangers to the ship
(Q)
you've made a passage plan up for a voyage from Aberdeen to
Egypt, how will you find out the state of the tide in the area
your going too?
(a)
by using the tidal diamonds that's on the chart of the area
your going too
(Q)
Why is it important to keep your charts up to date?
(a)
Incase any new obstructions endanger your vessel, sunk vessel
with her masts above the water, well-heads, new approaches to
a harbour, oil-rig shifted position Etc.
(Q)
How do you correct your charts up to date?
(a)
By using the Cumulative Notices to Mariners and
cross referencing them against the numbers of past corrections
on the bottom left hand side of your chart.
(Q)
What would you do if there was a correction missing?
(a)
Find out the correction number and what issue of the Weekly
Notices to Mariners it was contained in and enter it and put
the correction number in at the bottom left hand side of the
chart then sign it and date it.
(Q)
What is Position fixing?
(a)
By using your GPS and taking the lat/long and placing this onto
a chart
(Q)
How can you Position fix your position on a chart if you only
have a radar, charts and a magnetic compass 2 miles from a point
of land?
(a)
By taking a compass bearing of the point of land and changing
this to a true bearing then reversing the true bearing, now
draw a line with the true reversed bearing from the point of
land and measure off 2 miles this will give you an approximate
fix
(Q) What publication would you find all
the charts of the world?
(a)
Admiralty World Charts
|
