Navigation

Question 1

What are latitude/longitude?

Answer 1

Lat measured north and south

Long measured east and west

Question 2

What are 4 different methods of obtaining a ships position?

Answer 2

Visual, GPS, Celestial, Radar

Question 3

What is Set and Drift?

Answer 3

Set, course ship is being pushed

Drift, speed ship is being pushed

Question 4

What does DR stand for and what is it?

Answer 4

Dead reckoning, determining ships position (estimated guess) not taking into account set and drift

Question 5

What is the difference between true and relative bearing?

Answer 5

True, true north

Relative, relative to ships bearing

Question 6

What are different bridge watch stations and duties?

Answer 6

OOD, QMOW, BMOW, CONN, HELP, LOOKOUT

Question 7

What is Variation/Deviation?

Answer 7

Variation, worlds magnetic polarity

Deviation, ships magnetic polarity

Question 8

QM Equipment and what are they used for?

Answer 8

Fathometer: Depth of water ship is in

Barometer: atmospheric pressure

Sextant: Precision instrument that can measure angles in degrees, minutes, and seconds

Stadimeter: Measures the distance of an object of known height such as a mast

Psychrometer: An instrument used for determining atmospheric humidity consisting of dry-bulb and wet-bulb thermometers

Magnetic Compass: Secondary course in case the gyro goes down

Telescopic Alidade: Telescope equipped with cross hairs, level vial, polarizing light filter and internal focusing

Gyrocompass: Used for keeping the ship on course

VMS

Question 9

What are some common In Port Flags?

Answer 9

• SOPA - Senior Officer Present Afloat)
• KILO - Personnel working aloft
• LIMA - HERO Condition
• OSCAR - Man Overboard
• 1st Flag - Flag Officer Absent
  2nd - Chief of Staff
  3rd - SUB CO Absent
  4th - SUB Civilian Personnel embarked absent
• Bravo - Transferring fuel or ammo
• Alpha - Divers
• Papa - Personnel recall

Question 10

UNREP flags and uses

Answer 10

• Golf - guide ship
• Romeo - Receiving ship at the dip steady on course and speed;
  closed up and I am ready for your approach;
  hauled down when first shot line is in hand;
  prep at the dip 15 minutes till disengage closed up replenishing down;
  hauled down all lines clear
• Bravo - transferring fuel

Question 11

Day Shapes

Answer 11

Ball - Anchored

Ball Ball - Not under command

Ball Ball Ball - Aground

Ball Diamond Ball - Restricted maneuvering

Cylinder - Constrained by draft

Question 12

Sound Signal in restricted visibilty

Answer 12

• A power driven vessel u/w (one prolonged every two minutes)
• Power driven vessel u/w but not making way (two prolonged blasts every two minutes)

Question 13

What extra watches are manned in a low visibility situation and purposes?

Answer 13

Extra personnel posted one each bridge wing, the forecastle, and on the flight deck

Purpose: Listening and looking for any dangers to navigation

Question 14

What is swing circle/drag circle?

Answer 14

• Swing Circle (length of the ship plus scope of chain)