Doppler Speed Log works on the principle of Doppler shift in frequency measurement i.e. an apparent change in frequency received when the distance between source and observer is changing due to the motion of either source or observer or both. Doppler Log is used to indicate speed and distance are…View More Performance Standards – Doppler Speed Log
Any cargo that has to be loaded, maintained and/or carried at a certain temperature in order for it to reach its destination without deterioration is classed as refrigerated cargoes. This includes meat, fish, poultry products, dairy products, drugs and experimental samples. Refrigerated cargoes are perishable to a greater or lesser degree, and their…View More What are refrigerated cargoes?
Autopilot is basically used when ship has to steer a set course for a long time without alteration because any deviation from the set course is controlled electronically and automatically. This will not only relieve the helmsman from steering duties but is also more efficient because as soon as the…View More Performance Standards – Autopilot and Heading Control System
Digital Selective calling (DSC) is an initial means of alerting device for any Distress / Urgency / Safety communications. In other words this device is used to bring the attention of OOW before transmitting the Distress / Urgency / Safety Message using other communication methods such as Radiotelephony (R/T) or…View More What is Digital Selective Calling (DSC) ?
LRIT stands for Long Range Identification and Tracking. While meeting the general requirements for ship borne radio equipment forming part of the global maritime distress and safety system (GMDSS) and for electronic navigational aids, the LRIT should comply with the following minimum requirements: IMO PERFORMANCE STANDARDS FOR LONG RANGE IDENTIFICATION AND TRACKING SYSTEM (LRIT)…View More Performance Standards – LRIT
Automatic Identification System (AIS) is a system which provides a means whereby ships exchange information such as ID, position, course, speed etc, with all other ships in vicinity ans shore stations. IMO has specified performance standards for AIS fitted on ships, these performance standards help avoid sub standard ships and…View More Performance Standards – AIS