Specifications

Figure 5.3.9. Opening the hatchcover by using a screw in the lifting hole.

5.3.6 Antennae

The antennae are also part of the modular design of the WR-SG, DWR-MkIII and DWR-G. Not

only will it be possible to replace antennae with upgraded versions, but you may also extend

buoy functionality with future options that are not even perceived yet. Figure 5.3.10 shows the

antennae that are currently available.

Mounting an antenna on a port is straightforward. Make sure antenna and port are clean

and dry. Put the rubber sealing ring in place in the port groove. Slowly lower the insert in the

port, allowing the connectors to centre. A slight tolerance on the antenna connector will

accommodate small misalignment. The connector inside the port is waterproof. This means that

water will not enter the buoy if your antenna is leaking (after a collision or if the rubber sealing

ring is absent). Nevertheless, electrical short-circuits may stop the buoy from functioning. Blind

flanges are available to cover unused ports. Use the 6 hexagon socket screws to fasten the

antenna, see Figure 5.3.11.

The port labelled GPS is intended for a GPS position antenna, for WR-SG and DWR-

MkIII buoys, or a GPS wave antenna, for DWR-G buoys. In the case of the GPS wave antenna,

the antenna is placed on an identical spring in order to overlook the HF antenna spring and the

buoy sides when the buoy is tilted. GPS positioning is less demanding, therefore the GPS

antenna will be placed directly on the flange of the port without a spring.

Argos, Orbcomm, Iridium and the GSM antenna will be mounted on the option port (see

Figure 5.3.8).

The modular design of the electronics unit and the ports on the hatchcover already

provides for these options and allows easy upgrading of your wave measurement equipment.

Due to lack of space the DWR-G 0.4 m does not feature option and mounting ports, instead a

GPS antenna, LED flasher and HF whip antenna base are mounted permanently.

Visit our website or subscribe to our semi-annual bulletin e-mailing if you want to be

informed when new options become available.