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CHIEF MATE EXAM ORAL QUESTIONS AND ANSWERS - LATEST QUESTIONS | Page 30
Q. 291) How will you correct the deviation of magnetic compass.
X
Q. 293) Wen & how you take ex meridian sight , long by chron , polaris sights ?
XEX MERIDIAN : IF THE BODY OBSERVED WHEN NEAR THE MERIDIAN WHEN ITS HOUR ANGLE IS SMALL (THE LIMIT OF HOUR ANGLE IS LAT DIFFERENT DECN ARE SAME NAME AND THE RATE OF CHANGE OF ALTITUDE WILL BE LARGER)
THERE FOR EX MERIDIAN LIMITS ARE SMALLER THAN WHEN LAT AND DECN ARE DIFFERENT NAME.
POLARIS: WE KNOW THAT ALTITUDE OF OF THE CELESTIAL POLE IS EQUAL TO THE LATITUDE OF OBSERVER.POLARIS IS SITUATED VERY CLOSE TO CELESTIAL NORTH POLE.
LONG BY CHRON: TO CALCULATE THE NOON POSN REQUIRED LONG BY CHRON AT MORNING HOURS IS THE TIME FOR TAKING LONG BY CHRON
Q. 295) Signal for hover craft ?
XWHEN OPERATING IN NON DISPLACEMENT MODE SAME AS POWER DRIVEN VESSEL UNDER WAY AND ADDITIONALLY ALL AROUND FLASHING YELLOW LIGHT.
Q. 296) cleansing of anchor and hanging of anchor
XCLEARING ANCHOR: ANCHOR AND CABLE ARE CLEARED AWAY WHEN THE SECURING GEAR ON DECK IS REMOVED THIS MAY INCLUDED CHAIN BRIDLES PASSED THROUGH CABLE AND SHACKLED TO THE DECK AND DEVIL'S CLAWS WHICH ARE METAL BARS HOOKED THROUGH THE CABLE.
HANGING OFF AN ANCHOR: IF IT IS DESIRED TO HAVE A FREE END OF CABLE AVAILABLE FOR USE THE ANCHOR WILL HAVE TO BE DETACHED FROM THE CABLE USUALLY THE FIRST SHACKLE OF THE CABLE INCLUDES THE JOINING SHACKLE 2-4 M FROM THE ANCHOR SHACKLE SO THAT WHEN THE ANCHOR IS STOWED THE JOINING SHACKLE IS BETWEEN THE GYPSY AND HAWSE PIPE IF THE CABLE CAN BE PASSED THROUGH A FORWARD PANAMA CANAL FAIRLEAD , THEN THE ANCHOR CAN BE SIMPLY BE SECURED IN THE PIPE USING WIRE LASHING AND THE BOW STOPPER.THEN THE CABLE CAN EASLLY JOIN.
Q. 297) How will you drop anchor with no wind and no current ?
Xapproach in slow speed and the anchor is let go while the ship is head way or stern way.the cable is laid out the engine is relieve stresses in the cable just before the vessel brings to. usually prefers to stop at the anchorage by going astern. when the propeller wash reaches the abeam of the bridge he uses that as that the ship is lost way.the engines are then kept going dead slow stern as the anchor is let go.engine are stopped immediatly and the vsl drift astern laying out her cable.
