An ECDIS is a unified navigational information display which presents on an updated chart background,updated route,present position and fast track, combining these as approprite with radar,ARPA and other navigational sensors in order to improve safe navigational through the clear display of the situation in the vicinity of the ship.
chart can be corrected through a floppy disc,compact disc, even directly through the satellite systems. The latest system of updating charts is that the manufacturer transmit the chart updated as broadcast in coded format. Dedicated software is fitted in the ECDIS which will receive these updates,decode them and correct the charts.
ECDIS stand electronic chart display and information system. It is updated with the help of a CD.
In case of personnel in working in the cargo hold, pls evacuate immediately after hearing the audible alarm n report to the designated mustr station.
close the ventialtion to the hold
close the hatches
release the CO2
three seperate and distinct strokes ring the bell rapidly for about 5seconds in fore part of the vsl and three seperate and distinct strokes and gong shall be sounded rapidly for about 5second in the after part of the vsl and three seperate and distinct strokes.
Annex IV Regulations for the Prevention of Pollution by Sewage from Ships
Annex V Regulations for the Prevention of Pollution by Garbage from Ships
Vector charts are more advantageous than raster chart because vector chart enables user to select many alarms, such as depth alarms, various modes such as head up and north up, Zooming facility, Add or remove the data required.
as it is in vector charts info stored in layers so u can select the reqd info which v cant do on vecor charts .
example of SECA are north sea,baltic sea,north american waters.
and united nation carribean region
barograph is a instrument which record the change in atm press. onboard ship.
for more detail read met book.
barograph is aneroid berometerwhich measuresd contonuous record of pressure on a paper chart,the barograph has continuous trace on the chart called barogram. the curved line indicate utc are two hor interval.after completing barogram entries regarding lat,long,dates,comparison with barometer are to be filled and it is kept along with the weather log books
The Change in ships trim when being at motion or being stationary is called squat. The Squat is mainly experienced over in shallow waters it increases with square of the speed of the ship in order to reduce squat ship speed has to be reduced squat is calculated by the formulae
squat= V(square)/100*Cb
Squat is a bodily sinkage of a ship due to its movement through the water and is depend on speed, ship form, and the underwater clearance.
The overall decrease in the underkeel clearance fwd. and aft is called squat.
TO ELIMINATE SQUAT;
reduce speed,
Sufficiant UKC is to be kept to avoid SQUAT.
