Installation Guide

2-12
Installation Guide 84464 Rev. E
Installing the Certus 200 Above Deck Unit (Antenna)
The Certus 200 antenna dimensions and included hardware are shown in Figure 2-8. The
antenna has a single M18 threaded mounting post on the bottom and includes a gasket, a
stainless steel washer and two stainless steel M18 nuts for mounting the antenna to a custom
made plate or an available accessory kit from Thales.
The Thales accessory pole mount kit part number is 1100855-501
Note: When making a custom mounting plate or drilling a hole in an existing plate, the hole
should optimally be 19mm in diameter.
Steps to mount the antenna to a custom plate:
1. Drill a 19mm hole in a plate with thickness of 4mm or less.
2. Remove the nuts and washer from the antenna’s threaded post. Leave the gasket in place,
pressed against the antenna’s base. Add thread locking liquid (user provided) to the M18
threaded post if desired.
3. Attach a ground cable (user provided) to the antenna base using a small M3 screw (see
Figure 2-9) and route the cable through the opening in the base to the vessel’s chassis for
added protection against power surges.
4. Place the antenna’s threaded post through the hole making sure the gasket is flat between
the antenna’s base and the plate (see Figure 2-10).
5. Insert the washer and tighten the first nut (max of 15 in-lb. or 1.7 Nm) until the plate is
tight between the gasket and washer and the antenna does not move as shown in Figure 2-
10.
6. Tighten the second nut against the first nut to ensure a tight fit that will not loosen under
operational conditions (Figure 2-10).
7. Attach the coaxial cable to threaded TNC connector.
8. Add self-vulcanizing tape or other waterproofing material (user provided) to keep the RF
connection completely dry.
9. Run the coaxial cable to the BDU installation location.