Navigation ESWS Study Guide – Enlisted Surface Warfare Specialist Qualification
Prep
Who is the Navigator? - ✔✔LCDR Carrington
Who is the assistant Navigator? - ✔✔QMCS Nicol
what is VMS? - ✔✔voyage management system
Uses electronic charges to monitor ships position and primary inputs
Located in the CIC, Nav's state room, QMOW table, Conning station and Chartroom
What does ECDIS-N stand for? - ✔✔Electronic chart display and information system-navy
What are the types of electronic navigation equipment? - ✔✔Fathometer, RADAR, GPS, INS
(gyro's)
What is the stadimeter used for? - ✔✔measures the distance of an object with a known height
What is the sextant used for? - ✔✔Used to shoot and measure celestial bodies for a celestial
fix
What information does a gyrocompass provide? - ✔✔True north bearing for ships course
what is the difference between true and relative bearing? - ✔✔True bearing: a circle of 360
degrees with true north being 000
Relative bearing: a circle of 360 degrees with the ships bow being 000
, What does GPS stand for? - ✔✔Global Positioning System
What is set and drift? - ✔✔Set: the direction a ship is pushed off course (left or right)
Drift: the speed the ship is pushed off course
What are the different methods of obtaining the ships position - ✔✔Electronic: AIS, SIMRAD,
GPS, INS, RADAR
Visual: Visual LOP (line of position), celestial, composite (mixed meaning a radar and a visual aid
is used)
What does GMT stand for? - ✔✔Greenwich mean time (GMT)
Also known as Zulu time (ZT) or Coordinated Universal Time (UTC)
Based off of time in Greenwich, England.
Sets a standard baseline for all other time zones in the world
how many time zones are there? - ✔✔25 total time zones, 12 being cut in half due to the
international date line
Each time zone is 15 degrees wide and is assigned a letter
Juliet is the ONLY letter that doesn't have a time zone
Define Variation - ✔✔The natural difference between true and magnetic heading
Define Deviation - ✔✔The mane-made difference between compass and magnetic heading
list the bridge watch standers - ✔✔OOD
Prep
Who is the Navigator? - ✔✔LCDR Carrington
Who is the assistant Navigator? - ✔✔QMCS Nicol
what is VMS? - ✔✔voyage management system
Uses electronic charges to monitor ships position and primary inputs
Located in the CIC, Nav's state room, QMOW table, Conning station and Chartroom
What does ECDIS-N stand for? - ✔✔Electronic chart display and information system-navy
What are the types of electronic navigation equipment? - ✔✔Fathometer, RADAR, GPS, INS
(gyro's)
What is the stadimeter used for? - ✔✔measures the distance of an object with a known height
What is the sextant used for? - ✔✔Used to shoot and measure celestial bodies for a celestial
fix
What information does a gyrocompass provide? - ✔✔True north bearing for ships course
what is the difference between true and relative bearing? - ✔✔True bearing: a circle of 360
degrees with true north being 000
Relative bearing: a circle of 360 degrees with the ships bow being 000
, What does GPS stand for? - ✔✔Global Positioning System
What is set and drift? - ✔✔Set: the direction a ship is pushed off course (left or right)
Drift: the speed the ship is pushed off course
What are the different methods of obtaining the ships position - ✔✔Electronic: AIS, SIMRAD,
GPS, INS, RADAR
Visual: Visual LOP (line of position), celestial, composite (mixed meaning a radar and a visual aid
is used)
What does GMT stand for? - ✔✔Greenwich mean time (GMT)
Also known as Zulu time (ZT) or Coordinated Universal Time (UTC)
Based off of time in Greenwich, England.
Sets a standard baseline for all other time zones in the world
how many time zones are there? - ✔✔25 total time zones, 12 being cut in half due to the
international date line
Each time zone is 15 degrees wide and is assigned a letter
Juliet is the ONLY letter that doesn't have a time zone
Define Variation - ✔✔The natural difference between true and magnetic heading
Define Deviation - ✔✔The mane-made difference between compass and magnetic heading
list the bridge watch standers - ✔✔OOD
