IMCA Mini RadaScan, Owner'S Manual

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IMCA M 229 5
5 Features
The sensor is a low power (1 watt) all-weather FMCW radar unit operating over a 100 MHz bandwidth in the
licence-free 9.25 GHz maritime radiolocation band. A 360° rotating antenna which is spun at a continuous rate
of 1 Hz provides unrestricted vessel manoeuvrability when trackingF targets, unlike a fixed antenna design.
The sensor works by detecting reflections from one or more ATEX certified responders mounted on a structure
such as an oil rig. The sensor calculates a relative target position which is sent to the DP system and the
dashboard.
A maximum of four responders can be detected by each sensor. They operate in four distinct frequency channels
specifically designed for the sensor and introduce a unique identifying code into the reflection to allow
unambiguous target identification and robust tracking. Each responder can also be used simultaneously by
multiple sensors which allows several vessels to obtain position information at the same time from one set of
responders.
There are two main modes of operation:

Single-target tracking provides target range and bearing measurements. It is mainly used in fixed structure
applications such as drilling rigs and production platforms;

Multi-targets tracking provides target range and bearing measurements and is also capable of calculating
vessel heading. It is mainly used in mobile structure applications such as vessel track and follow.
Once a valid relative position has been calculated, the sensor generates a standard DP telegram every second,
which is compatible with all modern DP systems.
5.1 System Advantages

All-weather operations;

uniquely coded responders ensure reliable tracking;

single or multiple responder capability;

automatic target detection;

full 360° scanning providing an unobstructed field of view;

uses coded responders making the system immune to false reflections;

responders are ATEX certified and intrinsically safe;

compatible with all leading DP systems;

versatile choice of responders to suit all applications (power cell pack powered, mains powered, or
rechargeable battery);

compact and lightweight design for easy transport and installation;

modular design to simplify servicing and maintenance.
5.2 System Disadvantages

Responder location must be selected to ensure line of sight is maintained throughout the operation;

requires the use of manufacturer’s own responders;

like all microwave based sensors, sea reflections can cause problems in still conditions if the
installation instructions are not followed carefully.