Systems Ltd
Watch Alert System
Type NT921 WA

The NT921 WA Watch Alert System is a robust and intelligent monitoring device which provides a reliable low cost backup facility for busy - and often short handed non SOLAS rated vessels (Workboats / Commercial Fishing / Wind Farm Support Units etc. The alert period can be operator specified as required for periods between 3 & 12 minutes and the system includes an emergency call facility to summon any remotely located crew members should immediate assistance be required.

Model NT921 WA
Watch Alert 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 WA 'Reset' button is operated on the main unit or when other Wheelhouse / Bridge located Resets (or optional Movement Detectors) are activated.

Failure to 'Reset' the system during the 30 second Bridge visual / audible alarm period will result in automatic Crew Call Alarm activation at remote locations.

In the event of a sudden crisis situation requiring immediate Wheelhouse backup, the NT921 WA also features an 'Emergency Call' facility which may be operated at any stage of the timing cycles.

Watch Alert Basic Configurations (DC only)

Outline & Mounting Dimensions

NT921 WA Manual download (PDF)

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