Bedienungsanleitung Standard Horizon CPF300i (Seite 113 von 166) (Englisch)

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CPF180i and CPF300i Page 115

14. AIS

AIS is an Automatic Identification System. It has been introduced to improve the safety of

navigation by assisting in the efficient operation of ship-to-ship location reporting and VTS

applications. The system should enable operators to obtain information from the ship

automatically, requiring a minimum of involvement of ship’s personnel, and should have a high

level of availability. AIS transponders installed on IMO vessels use VHF frequencies to:

· Transmit details of their own vessel

· Receive details from other vessels or navigation aids within VHF range.

STANDARD HORIZON GPS Chart Plotters are able to display AIS target (for collision

avoidance) on the Chart Page and AIS list pages when connected to a AIS receiver

(GX2100 or GX2150 STANDARD HORIZON VHF/AIS transceiver) or transponders which

output NMEA 0183 VDM sentence at 38400 or 4800 baud. The Chart Plotters are able to

show targets from both Class A (commercial) and Class B targets.

14.0 SYSTEM DEFINITIONS

· Target: It is a vessel equipped with AIS. Information about the targets is being received

by AIS Receiver and displayed on the screen.

· CPA : Closest Point of Approach is the closest distance that will be achieved between

your vessel and the tracked target, based on your vessel’s speed and direction and the

target’s speed and direction.

· CPA Limit: This is the distance from your vessel that a target may reach before a target

is deemed a threat.

· CPA Alarm: Occurs if CPA is less or equal to CPA Limit. This test is done for active

targets only.

· TCPA: Time to closest Point of Approach is the time remaining until the CPA will occur.

· TCPA Limit: This is the time remaining before the CPA is reached.

· TCPA Alarm: Occurs if TCPA is less or equal to TCPA Limit. This test is done for active

targets only and if CPA value is less or equal to CPA Limit.

· Radio Call Sign: International call sign assigned to vessel, often used on voice radio.

· Name: Name of ship, 20 characters.

· MMSI: Maritime Mobile Service Identity.

· MMSI number: A unique 9 digit number that is assigned to a DSC radio station. It

primarily registers the boat information in the U.S. Coast Guard’s national distress

database for use in emergency situations.

· Active Target: Target located within the Activation Range. Active target is represented

by oriented triangle with COG and Heading vectors. Rate of turn may also be displayed.

· Dangerous Target: Target detected by CPA or TCPA Alarm. Dangerous target is

Active Target by definition. For better visibility Dangerous Target symbol is flashing.

· Sleeping Target: Target located outside the Activation Range. Sleeping target is

represented by a small oriented triangle.

· Lost Target: When the AIS info is not received from that vessel for 3.5 minutes. The

presentation will be a flashing black triangle with a cross through.

· Activation Range: Range around your boat where targets become active. AIS target

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