AIS Flashcards
1
Q
What is AIS?
A
Automatic identification system -
- Is an autonomous VHF transceiver based line of sight 30 - 40 nm
- Transmits data from ship to ship when in range and transmits ship to shore
1
Q
class A receivers
(required vessels)
A
- class A receivers required for all SOLAS vessels
- All vessels over 300 GT on international voyages
- cargo vessels over 500 GT
- all passenger vessels
2
Q
Class A message data
Dynamic data
A
every 2 seconds to 3 minutes if moored
- position
- heading from gyro
- course
- SOG
- rate of turn
- navigational status
3
Q
Class A message data
Voyage data
A
EVERY SIX MINUTES -
- Destination
- ETA
- Cargo/type class
- POB
- Draft
4
Q
Class A message data
(Static data)
A
Every six minutes -
- IMO ship identity/MMSI
- International radio call sign
- Name
- principal dimensions
- location of positioning system
- type of positioning system
5
Q
what is SOTDMA?
A
Self Organising Time Division Multiple Access
- Allocates Class A vessels a future transmission spot.
