NorthStar Navigation Explorer 721US, Explorer 721EU installation manual Gimbal Installation

13.Two flat screws for the microphone bulkhead mount

14.Two spring washers for the microphone bulkhead mount

15.Two plain washers for the microphone bulkhead mount

16.Two nuts for the microphone bulkhead mount

17.Two flush-mount brackets for recessed installation

18.Two M5x32 screws for recessedinstallation

19.Two M5x10 screws for recessed installation

20.Two plastic stoppers for the recessed installation (not pictured)

21.Installation template (not pictured)

22.One 7 Amp spare fuse (not pictured) in case of accidental reverse of battery polarity

23.Explorer 721 base unit and microphone (not pictured)

24.Explorer 721 protective cover (not pictured)

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5

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18 & 19

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17

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7

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13

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16

7-4 Gimbal Installation

1.Hold the mounting gimbal at the chosen location and use a soft pencil to mark the screw hole positions onto the mounting surface.

2.If you can’t reach behind the mounting surface to attach the nuts, use the self-tapping screws instead of the flat screws shown in the picture. If you’re drilling into fiberglass, use a drill bit smaller than 3/16” (5mm) to drill the pilot holes.

Otherwise, drill the four screw holes where marked, using a 3/16”(5mm) drill bit. Drill completely through the mounting surface.

3.Use a Philips screwdriver and the set of four flat screws, spring washers, plain washers, and nuts to attach the mounting gimbal to the location site.

56 Northstar Explorer VHF Series: 721US, 721EU Operation and Installation Manual