ROR Cards

Abort Point and Point of no Return

What is Abort Point and Point of no Return ? When approaching constrained waters, the ship may be in a position, beyond which it will not be possible…

Contingency Anchorage

What is Contingency Anchorage? An Anchorage area marked after the abort point and point of no return where, the ship can anchor in the case of an em…

CIRM (The International Radio Medical Center)

CIRM - Centro Internazionale Radio Medico The purpose of CIRM , giving radio medical advice to ship on any nationality navigating on all sea of the w…

Standard Procedure of Correcting a Chart

What is the standard procedure for correcting a chart? 1) On receipt of weekly notice to mariners, see the index of charts affected that is given in…

EM Log

What is EM Log ? Measures speed through water. Principle :-       It works on Faraday Maxwell law of electro magnetic induction. An EMF is induced in…

Wheel Over Point or WOP

What is wheel Over Point ?   When the wheel is turned the ship take some time to respond and this is primarily due to the inertia of ship. Hence the …

Rate of Turn Indicator or ROTI

Rate of Turn Indicator It indicates the instantaneous rate at which ship is turning. Purpose - It is used to monitor the turn. Requirement - All sh…

LRIT Or Long Range Identification and Tracking

Long Range Identification and Tracking • All passanger ship to carry LRIT. •   Mandatory for all ship more than 300 GT on International Voyage and 5…

ASD or Admiralty Sailing Directions and its Correction ?

What is Admiralty Sailing Directions? Admiralty Sailing Directions provides valuable information that may be needed by a mariner regarding any ar…

Guide to Port Entry

Guide to Port Entry Guide to port entry is published in two volume covering the ports of entire world, giving variety of information regarding vari…

INTERCO "International Code of Signal"

INTERNATIONAL CODE OF SIGNAL   The purpose of the INTERCO is to provide communication in situations related essentially to safety of navigation and…

GMDSS equipment as per Sea Area

SHIPBOARD EQUIPMENT FOR GMDSS Area A1 1. VHF radiotelephone 2. VHF DSC on Ch 70 3. VHF DSC watch receiver 4. SART 5. NAVTEX 6. Enhanced…

Flooding Action

FLOODING 1) Sound general emergency alarm 2) Close all water tight doors 3) Sound bilges and tanks 4) Carry out damage stability calculation 5) Ide…

Grounding Action

STRANDING / GROUNDING 1) Stop the Engine 2) Inform the master and engine room 3) Sound the general emergency alarm 4) Two all round red lig…

MOB Action

MAN OVERBOARD 1) Wheel hard over to casualty side 2) Release MOB marker 3) Press MOB on the GPS 4) Raise general emergency alarm 5) Infor…

Collision Action

COLLISION 1) Sound the general emergency alarm.  2) Inform the master and engine room.  3) Manoeuvre the ship to minimize the effect of colli…

DGPS

Differential GPS • The differential GPS system is used to enhance the accuracy of the normal GPS system.  •  It is used in surveying, dredging, drill…

How to make Gyro North Seeking

• The requirement of Gyro is that it must settle down and maintain a fixed direction with respect to earth. This settling position should be such as …

Tropical Revolving Storm

TRS Tropical Revolving Storm is a small area of very low pressure, around which wind of gale force (8) Or more blow spirally inwards.  Anticlockwise …