Sextant
The sextant is an instrument used to measure angles. Its arc is one sixth of a circle. Hence it is…
Month: March 2021
Under Keel Clearance
A change in draught may arise during a voyage due to factors such as cargo and ballast changes as well…
MANDATORY ECDIS ALARMS AND ALARM SETTING
Below is the list of mandatory alarms / indication as per MSC Resolution 232(82). Alarm: An alarm or alarm system…
ENC CHART CORRECTION
ENCs are updated by weekly ‘Notices to Mariners’ issued by Hydrographic Offices / Regional ENC co-ordination centers ( RENC) and…
ECDIS – Detection Area
A valuable function of ECDIS is to continuously display position fixes and at the same time, monitor a detection area…
Storm Navigation
Finding the Quadrant – Northern Hemisphere Northern Hemisphere If the wind veers she is in the right hand semicircle (Dangerous…
Steering Gear
Purpose of steering gear The steering gear provides a movement of the rudder in response to a signal from the…
Fixed CO2 Fire Extinguishing System
How CO2 extinguishes fire At atmospheric pressure carbon dioxide is a colouless, odourless and non-conductive gas that can quickly and…
Anchoring Methods
Three types of methodsVessel generally use any one of the following methods: “Dropping” or “letting go” anchor from the hawse…
Weather Routeing- Planning
Weather routeing is the procedure of ensuring that the ship makes an ocean passage in the least possible time conducive…