NN220 12 WEEKS REVIEW EXAM
QUESTIONS AND ANSWERS 100% PASS
Electronic Navigation (E-Nav) - ANS IMO Definition: "The harmonized collection, integration,
exchange, presentation and analysis of marine information on board and ashore by electronic
means to enhance berth to berth navigation and related services for safety and security at sea
and protection of the marine environment."
NOAA (National Oceanic and Atmospheric Administration) - ANS - nautical charts and pubs
for coastal areas/Great Lakes
- typically civilian focused products
- ENCs for US territory for use by civilian/merchant vessels
NGA (National Geospatial Intelligence Agency) - ANS - Produces DNCs for use by Navy and
info for wider DoD
- Provides access to international publications
USCG (US Coast Guard) - ANS - provides updates for navigation warnings for US districts
- provides Local Notice to Mariners
UN (United Nations) - ANS - UN Conventions on Law of the Sea (UNCLOS)
- signed but not ratified
**IMO (International Maritime Organization) - ANS - promoting safety and efficient
navigation
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, - SOLAS Article -> ECDIS requirement in ships
- V/19 makes ECDIS mandatory in passenger ships over 500GT or cargo ships over 3000GT
S1 (IMO Objective for E-Nav) - ANS improved, harmonized, and user-friendly bridge design
S2 (IMO Objective for E-Nav) - ANS means for standardized and automated reporting
S3 (IMO Objective for E-Nav) - ANS improved reliability, resilience, and integrity of bridge
equipment and navigation information
S4 (IMO Objective for E-Nav) - ANS integration and presentation of available information in
graphical displays received via communication equipment
S5 (IMO Objective for E-Nav) - ANS improved communication of VTS Service Portfolio
ECS (Electronic Charting System) - ANS computer assisted navigation system capable of
displaying electronic nautical charts and the vessel's position in real time
- BASIC level of capability
- does NOT meet IMO standards for navigation
- Navy: may be used for situational awareness, NOT navigation
- typically on pleasure craft
ECDIS (Electronic Chart Display and Information System) - ANS navigation system which with
adequate backup arrangements can be accepted as complying with up-to-date chart required
by 1974 SOLAS Convention and displays: Positional Information, Route Planning and Monitoring
- ADVANCED level of capability
- MEETS IMO standards for navigation (hardware, software, and electronic charting
requirements)
- MANDATED in large vessels
- Fitted into all new commercial/military vessels as mandated by the IMO
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
QUESTIONS AND ANSWERS 100% PASS
Electronic Navigation (E-Nav) - ANS IMO Definition: "The harmonized collection, integration,
exchange, presentation and analysis of marine information on board and ashore by electronic
means to enhance berth to berth navigation and related services for safety and security at sea
and protection of the marine environment."
NOAA (National Oceanic and Atmospheric Administration) - ANS - nautical charts and pubs
for coastal areas/Great Lakes
- typically civilian focused products
- ENCs for US territory for use by civilian/merchant vessels
NGA (National Geospatial Intelligence Agency) - ANS - Produces DNCs for use by Navy and
info for wider DoD
- Provides access to international publications
USCG (US Coast Guard) - ANS - provides updates for navigation warnings for US districts
- provides Local Notice to Mariners
UN (United Nations) - ANS - UN Conventions on Law of the Sea (UNCLOS)
- signed but not ratified
**IMO (International Maritime Organization) - ANS - promoting safety and efficient
navigation
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, - SOLAS Article -> ECDIS requirement in ships
- V/19 makes ECDIS mandatory in passenger ships over 500GT or cargo ships over 3000GT
S1 (IMO Objective for E-Nav) - ANS improved, harmonized, and user-friendly bridge design
S2 (IMO Objective for E-Nav) - ANS means for standardized and automated reporting
S3 (IMO Objective for E-Nav) - ANS improved reliability, resilience, and integrity of bridge
equipment and navigation information
S4 (IMO Objective for E-Nav) - ANS integration and presentation of available information in
graphical displays received via communication equipment
S5 (IMO Objective for E-Nav) - ANS improved communication of VTS Service Portfolio
ECS (Electronic Charting System) - ANS computer assisted navigation system capable of
displaying electronic nautical charts and the vessel's position in real time
- BASIC level of capability
- does NOT meet IMO standards for navigation
- Navy: may be used for situational awareness, NOT navigation
- typically on pleasure craft
ECDIS (Electronic Chart Display and Information System) - ANS navigation system which with
adequate backup arrangements can be accepted as complying with up-to-date chart required
by 1974 SOLAS Convention and displays: Positional Information, Route Planning and Monitoring
- ADVANCED level of capability
- MEETS IMO standards for navigation (hardware, software, and electronic charting
requirements)
- MANDATED in large vessels
- Fitted into all new commercial/military vessels as mandated by the IMO
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
