a great circle track is the shortest distance , measured along the earth's surface , btween 2 poles. a great circle track cuts successive meridians at different angles b'coz meridians are nt parallel to each oder . the course, therefore, shud change slightly whilst crossing each meridia.practically at sea, the departure and arrival positions are plotted on a gnomonic chart and joined by a straight line . the vertex and suitable points are read off the chart and the navigator does mercator sailing from point to point thereby following the great circle track effectively ..!!
Annex I Regulations for the Prevention of Pollution by Oil
Annex II Regulations for the control of Pollution by Noxious Liquid Substances in Bulk
Annex III Regulations for the Prevention of Pollution by Harmful Substances Carried by Sea in Packaged Form
Annex IV Regulations for the Prevention of Pollution by Sewage from Ships
Annex V Regulations for the Prevention of Pollution by Garbage from Ships
Annex VI Regulations for the Prevention of Air Pollution from Ships
ascertain if risk of collision exist with the targets by continuosly monitoring the bearing. and take action accordingly
imdg used to regulate the transportation of dangerous goods by sea
without harming the persons working on board, marine life nd ships
manuevrd 3 moths
drill evry month
engines tried out 3 mins evry month
all lights tried out
communication tried out
rudder from hard port to hard stbd
A sextant is an instrument used
to measure the angle between
any two visible objects. Its
primary use is to determine the
angle between a celestial object
and the horizon which is known
as the object's altitude. Making
this measurement is known as
sighting the object, shooting the
object, or taking a sight and it is
an essential part of celestial
navigation. The angle, and the
time when it was measured, can
be used to calculate a position
line on a nautical or aeronautical
chart.
