AIS, LRIT & BNWAS

Question 1

AIS?
3 main functions:

Answer 1

Automatic Identification System

Assist target tracking
Simplify information exchange
Additional information - Situ. Awareness

Question 2

AIS Range?

Answer 2

VHF range

Question 3

Vessels required to have AIS?

Answer 3

Passenger over 500GT

Cargo over 3000GT

Question 4

Vessels exempt from AIS?

Answer 4

Warships
Government owned & operated
Naval auxiliaries

Masters may turn AIS off for security concerns.

Question 5

3 types of AIS data:

Answer 5

Static - Info upon installation
Changed: Changes name / MMSI, ship conversion

Dynamic - Navigational status
Automatically updated by sensors

Voyage - Manually updated and changed
(Crew, passengers, towing, port)

Question 6

When should AIS be activated?

Answer 6

Underway or at anchor.

Question 7

DYNAMIC INFO should be periodically checked.
What 3 checks need to be done?

Answer 7

SOG
Positions acc. to WGS84
Sensor information

Question 8

Explain the symbols :

Answer 8

Question 9

Describe a Virtual AIS symbol:

Answer 9

Question 10

LRIT
MGN634

Operation
Power

Answer 10

Long Range ID Tracking

Global ID & Tracking

Satellite receives transmission from ship every 6 hours

Main & Emergency power

Question 11

BNWAS

3 Functions

Answer 11

Detects inactivity

Notify OOW or Master of inactivity

Calling for immediate assistance

Question 12

BNWAS

3 detection settings

Answer 12

Automatic (autopilot engaged)

Manual ON (constantly operating)

Manual OFF (does not operate under any circumstances)

Question 13

BNWAS alarm range?

Answer 13

Anywhere set by user between 3 & 12 mins