User guide

Page 3
INTRODUCTION
What Is NAVTEX?
NAVTEX is a worldwide system for the broadcast and automatic reception of
maritime safety information (MSI) in English by means of a narrow-band direct-
printing telegraphy. NAVTEX provides shipping with navigational and
meteorological warnings and urgent information.
NAVTEX is an element of the IMO/IHO worldwide Navigational Warning Service
(WWNWS) as defined by IMO Assembly Resolution A.706(17). It is included
within the Global Maritime Distress and Safety System (GMDSS). Since 1 August
1993, a NAVTEX receiving capability has become mandatory equipment for
certain vessels under the provisions of the International Convention for the Safety
of Life at Sea (SOLAS).
NAVTEX broadcast information is available to all seafarers, free of charge.
How Does NAVTEX Work?
NAVTEX transmissions are sent from stations situated worldwide. The power of
each transmission is regulated to avoid the possibility of interference between
transmitters. Each station is allocated a 10-minute time slot every 4 hours so that
many stations can share the same frequency. Stations typically have a
transmission range of 250 – 300 Nm.
ICS NAV6 FEATURES
The ICS NAV6 range
ICS NAV6plus full feature NAVTEX with NMEA repeater instrument displays,
includes dual channel NAVTEX sensor with 10m sensor cable.
ICS NAV6Aplus full feature dual channel NAVTEX with NMEA repeater
instrument displays, supports a wide variety of antenna types such as an
insulated backstay wire or active and passive whip antenna systems.
ICS NAV6dual dual channel NAVTEX only, includes dual channel NAVTEX
sensor with 10m sensor cable.
ICS NAV6repeater stand alone NMEA repeater instrument display, can be
connected to ICS NAV6plus/Aplus NAVTEX system using a ICS NAV6hub