AGRI101 Chapter Notes -International Maritime Organization, International Regulations For Preventing Collisions At Sea, Institute For Operations Research And The Management Sciences
12 Jun 2022
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CONTRIBUTING TO SAFE NAVIGATION
MODULE DESCRIPTOR :
This module covers the skills and knowledge required in assisting
the officer of the watch safely navigate the vessel or conduct a watch in
sole charge of a vessel.
LEARNING OUTCOMES:
At the end of this module you MUST be able to :
1. Contribute to monitoring and controlling a navigational watch
2. Maneuver the vessel when contributing to the efficient running of
the watch
Information Sheet 6.1-1
Learning Objective:
After reading this information sheet you should be able to conform
with the requirements contained in the International Regulations for
Preventing Collisions at Sea and to instructions received.
International prevention of collision at sea regulations
The International Regulations for Preventing Collisions at Sea 1972
(COLREGs) are published by the International Maritime Organization
(IMO) and set out, among other things, the "rules of the road" or
navigation rules to be followed by ships and other vessels at sea to
prevent collisions between two or more vessels.
How can we prevent collision at sea?
Collision Avoidance Checklist
1. Avoid ship channels where possible, or cross them quickly.
2. Be alert: Watch for ship traffic.
3. Think before you drink! ...
4. Be seen, especially at night.
5. Know whistle signals: Five or more mean danger.
6. Use radio channel 13 for bridge-to-bridge communication.
7. Use up-to-date navigation charts
What are the causes of ship collision?
Human error is the most common cause of maritime collisions.
Weather: Next to human error, weather conditions have the biggest
impact on maritime accidents. Fog obstructing vision, high winds exerting
force on vessels, ice flows colliding with vessels all fall under this category.
How many seconds is the durations of a short blast?
short blast--A blast of about a one second duration. prolonged blast--A
blast of from four to six seconds' duration.
What do 3 short blasts of a horn indicate?
Changing Direction
Two short blasts tell other boaters, “I intend to pass you on my right
(starboard) side.” Three short blasts tell other boaters, “I am operating
astern propulsion.” For some vessels, this tells other boaters, “I am
backing up.”
What does 5 horn blasts mean?
A Sound Signal that Indicates Danger
5Short Blasts. This horn signal indicates danger and can be used to
communicate potential collision with another vessel
What does 3 blasts of a ship horn mean?
Three Short Blasts - This means you are operating in astern propulsion,
for example backing away from a dock. One Prolonged Blast
+Three Short Blasts – This is technically two different signals in
succession. One prolonged blast indicates you are getting under way,
and three short blasts indicate you are backing up.
Why do boats honk 3 times?
SHE: Why do they honk three times when they come into port? HE: They
are signalling that they are coming home. There's an old legend of Arturo,
a Portuguese fisherman who met a beautiful girl when he came into port.
What does 4 blasts of a ship horn mean?
prepares to depart the dock the skipper gives four blasts on the horn to
alert local boaters they are getting underway.
What does prolonged blast every 2 minutes mean?
One prolonged blast at intervals of not more than two minutes is a signal
used by power driven vessels when underway. One prolonged blast,
plus 2short blasts at intervals of not more than
two minutes apart, is the signal used by sailing vessels.
What does a red and green light indicate when seen together at night?
Sidelights: These red and green lights are called sidelights (also called
combination lights) because they are visible to another vessel approaching
