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Apparent Wind Indicators

Cat Hawk Assembly Instructions


1. Ensure you have all the correct pieces:

1 x Vane Arm
2 x Reference Arms
1 x Aluminium Support Rod
1 x Locking Block
1 x Bridle Clip 1
1 x Bridle Clip 2, 1 x Large Self Tapping Screw
1 x Washer

Cat Hawk 1



2. The Vane Arm should be perfectly balanced when it leaves the factory.

Test this by putting the Support Rod into the vane arm and just slowly lift it off the table. The Vane Arm should remain parallel to the table.



Cat Hawk 1


3. If either end of the Vane arm drops quickly you will need to reposition the Counter Weight.

Gently bend the front of the Vane Arm until the counter weight lifts up. Slide it in the necessary direction and retest.

When the position of the Counter Weight is correct, ensure it is securely pushed into the Vane Arm.

Cat Hawk 1


4. Place the lip of the Vane Arm shaft into the locking block recess.

Push the Support Rod up through the locking block and into the Vane.

Cat Hawk 2

5. Push the Support Rod in far enough to ensure the Van Arm is lifted clear of the Locking Block surface as in the photo.

The Vane arm should now turn perfectly with no friction. Tighten the bottom of the 2 screws to lock the Locking Block onto the Support Rod.

Cat HAwk 3


6. Now place the 2 Reference Arms into the holes on top of the Locking  Block.

Adjust them to the desired reference angle. Tighten the top of the 2 screws to lock them in position. Your Cat Hawk is now ready to mount to your boat.

 Cat Hawk 4

7. The Bridle Clip can be set up to be used on the Adjuster Plate.

Cat Hawk 5


8. Or it can be set up so that it is on the Bridle Shackle.

Cat Hawk 7

HAWK Marine Products Ltd, Olympic House
Mill Rythe Lane, Hayling Island, Hampshire, PO11 0QG
TEL: +44 (0)23 92463864    FAX: +44 (0)23 92467204    Email: