Specifications

31
5.3.5 Hatchcover
Two hatchcover versions exist: one with two and one with three ports. These ports are
designated HF (whip antenna with LED flasher), GPS (GPS antenna for GPS position on WR-
SG and DWR-MkIII and GPS wave measurement on DWR-G alike) and, in case of three ports,
the third port (optional) is designated Orbcomm, Argos, Iridium or GSM, consistent with
prefixed cabling below. All ports require a rubber sealing ring for waterproof sealing. The ports
are centred on the hatchcover leaving enough separation to avoid contact and interference
between the antennae, Figure 5.3.8.
To close the hatch 24 hexagon socket screws are used. The hatchcover can be lifted by
using the threaded hole and one of the screws, in case of under pressure. See Figure 5.3.9.
Due to its smaller size the 0.4 m GPS buoy does not have ports, but rather a fixed set of
antennas. It is fastened with 8 hexagon socket screws (no threaded hole).
Figure 5.3.8. Drawing of the hatchcover components, (a) top side and (b) bottom side.