We will keep you updated
Why Correct Altitude As you have already learnt that the altitudes of the sextant are observed above the visible horizon. Eventually that altitude needs to be converted as an altitude above the rational horizon, which is a line parallel to the sensible horizon, passing through the centre of the earth. When the altitude is so…
How shallow water affects Manoeuvring? In shallow waters, manoeuvring has very many facets and it is necessary that we understand the same clearly. Such knowledge helps us to understand the effects of interactions including squat and the sluggish way the ship handles in such waters. It also helps us to avoid them and plan for…
What is Traffic Separation Scheme (TSS) Traffic Separation Schemes are designed to ease congestion, assist traffic flow and prevent ships approaching head on to each other in the busier waterways of the world. Their use should make navigation simple, but a great number of close quarters and collision situations continue to arise within Traffic Separation…
Stopping Distance Stopping distance is the distance, which, a ship will continue to move after action is taken to stop engines and till the ship comes to rest. Stopping distance details may be provided for sea speed, harbour speed, half speed etc. It may be provided for loaded & light conditions. Nowadays the precise course…
Read More “Stopping Distance, Turning Circle, Ships Manoeuvring” »
After reading this blog, you will be able to take amplitude of the heavenly bodies and calculate the compass error. Ensure that you workout such errors as frequently as possible when on onboard. Since refraction causes celestial bodies to appear elevated in the sky, they are above the horizon longer than they are otherwise. The…
Read More “Rising and Setting – Azimuth by Amplitude Twilight” »
Preamble IMO began work on the Global Maritime Distress and Safety System in the 1970s and its introduction marks the biggest change in maritime communications since the invention of radio. It has been introduced in stages between 1993 and 1st February 1999. The basic concept of the system is that search and rescue authorities ashore,…
Data Management The actual instructions and screen-shots in this guide are based on the version of the eGlobe G2 Series ECDIS installed in the UKHO as detailed on the front cover. There may be minor differences between certain models (i.e. screen layouts may vary). eGlobe G2 works with different combinations of hardware. This can…
Objective To understand classification of clouds, the various types of clouds and the weather associated with each. Classification Clouds are classified according to the height of the base above sea level and their appearance. Low clouds, medium clouds and high clouds. Clouds can form at any height from sea level up to the tropopause, which…
Aim The blog shall show the process of interpreting the radar information correctly for Navigation and Collision avoidance purpose. Introduction to the different display modes There are two modes of displays a The relative motion display and b The true motion display In the relative motion display the origin of the display and own…
Plotting of manoeuvres These examples assume no delay between the time of the last plot and the completion of any planned manoeuvre. In practice there will be a time delay in taking bearing, plotting etc, which should be accounted for by projecting the last plotted position (A) by the time interval required. Objective To find…