Fully compliant with IMO Resolution MSC.128(75) and with both Notified Body (BSH Germany) and Classification Society (GL) Type Approvals, the Navitron NT990BNWAS can be supplied as a basic system to operate proprietary alarm units or as an expanded system complete with alarm selector switch, individual officer cabin alarms and crew call units.

In either case, the NT990BNWAS provides a safety monitor requiring regular acknowledgement (Reset) by the duty watch personnel at time intervals between 3 and 12 minutes which can be specified and set by the master or OOW as considered appropriate.

Model NT990BNWAS Bridge Navigational Watch Alarm Display Unit	The chosen time interval (3 - 12 mins) is security protected by means of key switch selection as is the operating mode which may be set: -
	█	Permanently ON
	█	Permanently OFF
	█	AUTO mode (automatically activated by power up of other equipment such as Autopilot / Track Control system etc)
	Once activated, completion of the specified timeout period (3 - 12 mins) will automatically generate a Bridge visual alarm (15 secs) followed by a Bridge audible alarm (15 secs) which is tone and volume adjustable during installation. Alarm cancellation and commencement of a new timing period will occur whenever the BNWAS 'Reset' button is operated on the main unit or other Wheelhouse / Bridge located Reset units.

Failure to 'Reset' the system during the 30 second Bridge visual / audible alarm period will result in automatic 'Officer Call' alarm activation which, in an expanded system, can be routed to the appropriate duty officer cabin alarm unit. If the officer call alarm stage is not acknowledged within a maximum period of 3 minutes, a final stage Crew Call will automatically be generated.

In the event of a sudden crisis situation requiring immediate Officer assistance, the NT990BNWAS also features an 'Emergency Call' facility which may be operated at any stage of the timing cycles.

Further built in security and error management provisions include 'Tamper' and 'Power Fail' alarm indications fully commensurate with MSC.128(75).

The NT990BNWAS is suitable for vessels of all types and tonnages and can be supplied for both 115 / 230 VAC (DB2) and 24 Vdc (DB1) power supply applications.

█ BNWAS basic configurations (DC only and AC/DC)

█ BNWAS expanded system configuration (DC only and AC/DC)

█ Technical Specifications

█ Outline & Mounting Dimensions

█ NT990BNWAS (Basic System) Leaflet download (PDF)

█ NT990BNWAS (Expanded System) Leaflet download (PDF)

█ NT990BNWAS Manual download (PDF)