Page 1 of 39
BDOC - NSS EXAM (NAVDORM, GPS,
SHIPHANDLING, MOORING OPS) {LATEST 2026/
2027 UPDATE} COMPLETE ACTUAL AND
AUTHENTIC EXAM | BRAND NEW!
What is the purpose of the NAVDORM? - ✔✔✔ Correct Answer > The
NAVDORM publishes Type Commander (TYCOM) minimum navigation
policies, procedures, and organizational standards for all surface ships
What is required to be considered ECDIS - N? - ✔✔✔ Correct Answer >
Ability to manually plot fixes, TOD function and CO approval function
What are benefits to electronic charting? - ✔✔✔ Correct Answer >
Provides real time positioning and automated plotting via inputs from
the Global Positioning System (GPS) • Automated plotting of ship's
position reduces manpower requirements and reduces human error •
Integrated alarms and alerts for navigation dangers provide forceful
back-up for bridge watchstanders
What are the two types of electronic charts and what do they mean? -
✔✔✔ Correct Answer > Raster - Basically a PDF uploaded on to the screen
that looks exactley like the paper chart.
,Page 2 of 39
Vector - A layered system that organizes data better and serves as a
smart map.
Raster chart components - ✔✔✔ Correct Answer > - "Looks like the map."
Standard Appearance - Dumb Map: Very Little Ability for Automated
Analysis - Less Efficient Storage - Zoom function restricted by pixel size
- Much Easier/Cheaper/ Faster to Produce
Vector chart components? - ✔✔✔ Correct Answer > - Approximate look of
the map/ User-Defined Appearance - Smart Map: Can Allow Very
Powerful Automated Analysis - More Efficient Storage of Information -
Zoom function not restricted - Time/Manpower Intensive to Produce
What is included in VMS? - ✔✔✔ Correct Answer > DNC, ENC, NOAA and
BA-ARCS charts
What is appendix J/K? - ✔✔✔ Correct Answer > ‒ The NAVDORM
establishes the guidelines for the "Features" and "Profiles" settings of
ECDIS-N ‒ Appendixes are specifically tailored to the four types of
operational waters • Restricted • Piloting • Coastal • Open Ocean
What are the 5 levels of TOD and what does TOD mean? - ✔✔✔ Correct
Answer > Tactical Ocean Data
,Page 3 of 39
• TOD 0: Oparea, Range and Exercise Charts LIMDUS • TOD 1: Bottom
Contour (BC) Confidential • TOD 2: Bathy Nav Planning Charts (BNPC)
Secret • TOD 3: Shallow Water TOD Secret • TOD 4: Hull Integrity Test
Confidential • TOD 5: Straits Charts Secret
What is VMS? - ✔✔✔ Correct Answer > • The Voyage Management
System: - VMS automatically processes all sensor input - VMS is
compliant with ECDIS-N requirements - VMS provides output on
NGA's Digital Nautical Chart (DNCs) • VMS is part of the Integrated
Bridge System (IBS), which includes the ARPA (Advanced Radar
Plotting Aid) software
What is the GVRC? - ✔✔✔ Correct Answer > - GVRCs provide GPS inputs to
NAVSSI
What is the electro magnetic log? - ✔✔✔ Correct Answer > The Electro
Magnetic Log measures the speed of a vessel through the water
What is AN/SRN-25? - ✔✔✔ Correct Answer > The AN/SRN-25 is an
automated navigation system that provides continuous and accurate
ship positioning from GPS data
What is the JOTS? - ✔✔✔ Correct Answer > JOTS (Joint Operational Tactical
System): - A U.S. Fleet Intelligence Exchange System - JOTS is used to
share real-time intelligence between ships
, Page 4 of 39
What is INS? - ✔✔✔ Correct Answer > INS (Inertial Navigation System): -
An accurate, all-weather, self-contained navigation system that is
installed on submarines and surface combatants equipped with AEGIS
or Tomahawk weapon systems - INS provides accurate dead reckoning
positions (latitude and longitude), velocity, and attitude indications
(heading, roll, and pitch)INS accuracy degrades over time, therefore,
periodic ship position inputs (fixes) from external sources, like the GPS
units, are required to reset or update the system • The accuracy of the
INS depends on the accuracy of the initial fix entered, condition of the
system, and accuracy and stability of course and speed information
provided to the unit • INS should be updated whenever a good fix is
received • INS is also known as the AN/WSN-7 units
What is NAVSSI? - ✔✔✔ Correct Answer > The primary function of the
NAVSSI is to distribute common position, velocity, time, and almanac
data to onboard Command & Control and Combat Systems -
Distribution is completed in real time because the Global Positioning
System (GPS) serves as the primary source of navigation data • The
NAVSSI provides consistent, accurate, position, velocity, and time data
to all navigation-dependent shipboard systems • NAVSSI enhances the
ability of surface ships to perform navigation, ship control, and
combat missions
What is AIS? - ✔✔✔ Correct Answer > AIS (Automatic Identification
System): Provides surface vessels with counter intelligence • A VHF
transponder continuously exchanges navigation information between
BDOC - NSS EXAM (NAVDORM, GPS,
SHIPHANDLING, MOORING OPS) {LATEST 2026/
2027 UPDATE} COMPLETE ACTUAL AND
AUTHENTIC EXAM | BRAND NEW!
What is the purpose of the NAVDORM? - ✔✔✔ Correct Answer > The
NAVDORM publishes Type Commander (TYCOM) minimum navigation
policies, procedures, and organizational standards for all surface ships
What is required to be considered ECDIS - N? - ✔✔✔ Correct Answer >
Ability to manually plot fixes, TOD function and CO approval function
What are benefits to electronic charting? - ✔✔✔ Correct Answer >
Provides real time positioning and automated plotting via inputs from
the Global Positioning System (GPS) • Automated plotting of ship's
position reduces manpower requirements and reduces human error •
Integrated alarms and alerts for navigation dangers provide forceful
back-up for bridge watchstanders
What are the two types of electronic charts and what do they mean? -
✔✔✔ Correct Answer > Raster - Basically a PDF uploaded on to the screen
that looks exactley like the paper chart.
,Page 2 of 39
Vector - A layered system that organizes data better and serves as a
smart map.
Raster chart components - ✔✔✔ Correct Answer > - "Looks like the map."
Standard Appearance - Dumb Map: Very Little Ability for Automated
Analysis - Less Efficient Storage - Zoom function restricted by pixel size
- Much Easier/Cheaper/ Faster to Produce
Vector chart components? - ✔✔✔ Correct Answer > - Approximate look of
the map/ User-Defined Appearance - Smart Map: Can Allow Very
Powerful Automated Analysis - More Efficient Storage of Information -
Zoom function not restricted - Time/Manpower Intensive to Produce
What is included in VMS? - ✔✔✔ Correct Answer > DNC, ENC, NOAA and
BA-ARCS charts
What is appendix J/K? - ✔✔✔ Correct Answer > ‒ The NAVDORM
establishes the guidelines for the "Features" and "Profiles" settings of
ECDIS-N ‒ Appendixes are specifically tailored to the four types of
operational waters • Restricted • Piloting • Coastal • Open Ocean
What are the 5 levels of TOD and what does TOD mean? - ✔✔✔ Correct
Answer > Tactical Ocean Data
,Page 3 of 39
• TOD 0: Oparea, Range and Exercise Charts LIMDUS • TOD 1: Bottom
Contour (BC) Confidential • TOD 2: Bathy Nav Planning Charts (BNPC)
Secret • TOD 3: Shallow Water TOD Secret • TOD 4: Hull Integrity Test
Confidential • TOD 5: Straits Charts Secret
What is VMS? - ✔✔✔ Correct Answer > • The Voyage Management
System: - VMS automatically processes all sensor input - VMS is
compliant with ECDIS-N requirements - VMS provides output on
NGA's Digital Nautical Chart (DNCs) • VMS is part of the Integrated
Bridge System (IBS), which includes the ARPA (Advanced Radar
Plotting Aid) software
What is the GVRC? - ✔✔✔ Correct Answer > - GVRCs provide GPS inputs to
NAVSSI
What is the electro magnetic log? - ✔✔✔ Correct Answer > The Electro
Magnetic Log measures the speed of a vessel through the water
What is AN/SRN-25? - ✔✔✔ Correct Answer > The AN/SRN-25 is an
automated navigation system that provides continuous and accurate
ship positioning from GPS data
What is the JOTS? - ✔✔✔ Correct Answer > JOTS (Joint Operational Tactical
System): - A U.S. Fleet Intelligence Exchange System - JOTS is used to
share real-time intelligence between ships
, Page 4 of 39
What is INS? - ✔✔✔ Correct Answer > INS (Inertial Navigation System): -
An accurate, all-weather, self-contained navigation system that is
installed on submarines and surface combatants equipped with AEGIS
or Tomahawk weapon systems - INS provides accurate dead reckoning
positions (latitude and longitude), velocity, and attitude indications
(heading, roll, and pitch)INS accuracy degrades over time, therefore,
periodic ship position inputs (fixes) from external sources, like the GPS
units, are required to reset or update the system • The accuracy of the
INS depends on the accuracy of the initial fix entered, condition of the
system, and accuracy and stability of course and speed information
provided to the unit • INS should be updated whenever a good fix is
received • INS is also known as the AN/WSN-7 units
What is NAVSSI? - ✔✔✔ Correct Answer > The primary function of the
NAVSSI is to distribute common position, velocity, time, and almanac
data to onboard Command & Control and Combat Systems -
Distribution is completed in real time because the Global Positioning
System (GPS) serves as the primary source of navigation data • The
NAVSSI provides consistent, accurate, position, velocity, and time data
to all navigation-dependent shipboard systems • NAVSSI enhances the
ability of surface ships to perform navigation, ship control, and
combat missions
What is AIS? - ✔✔✔ Correct Answer > AIS (Automatic Identification
System): Provides surface vessels with counter intelligence • A VHF
transponder continuously exchanges navigation information between
