Specifications

GMDSS Global Maritime Distress Safety System

HDG Heading - The direction, in which the vessel is pointed, expressed as angular distance from

north clockwise through 360 degrees. HEADING should not be confused with COURSE. The

HEADING is constantly changing as the vessel yaws back and forth across the course due to

the effects of sea, wind, and steering error.

IALA International Association of Marine Aids to Navigation and Lighthouse Authorities

IEC International Electro-technical Commission

IEC 61162-1 Maritime navigation and radio communication equipment and systems – Digital interfaces

Single Talker- Multiple listeners: Closely related to NMEA0183 version 2.3, communication

at 4800 baud. Is the definition of both electrical interface and protocol to be used.

IEC 61162-2 Maritime navigation and radio communication equipment and systems – Digital interfaces

Single Talker- Multiple listeners, High speed transmission: Closely related to NMEA0183HS

version 2.3, communication at 34800 baud. Is the definition of both electrical interface and

protocol to be used.

IMO International Maritime Organization

IP Internet Protocol (IP) is the central, unifying protocol in the TCP/IP suite. It provides the

basic delivery mechanism for packets of data sent between all systems on an internet,

regardless of whether the systems are in the same room or on opposite sides of the world.

All other protocols in the TCP/IP suite depend on IP to carry out the fundamental function

of moving packets across the internet.

ISGOTT International Safety Guide for Oil Tankers and Terminals

ITU International Telecommunication Union

LAN Local Area Network

LED Light Emitting Diode

LCD Liquid Crystal Display

LR Long Range

NMEA National Marine Electronics Association – The NMEA electronics interface specifications

have been developed under the auspices of the Association. The NMEA 0183 is an

internationally recognized specification for interfacing marine electronics. NMEA 0183

version 2.3 is almost identical to lEC. 61162-1.

MKD Minimum Keyboard and Display

MMSI Maritime Mobile Service Identity

RCC Rescue Coordination Centre

RF Radio Frequency