Schaefer Marine Great Hawk Wind Indicator f/Boats From 8M - 20M. Schaefer Marine designed these Weather Instruments with reference arms that may be preset at 55 60 or 65 for upwind or downwind angles. The Schaefer Marine Great Hawk Wind Indicator w/ V-Jewely gives instant response to shifts and gusts with minimal inertia so that you can track the changing wind speed and weather conditions. The 5mm aluminum support rod in this Schaefer Marine Great Hawk Wind Indicator is strong enough to take normal wear and tear and can be bent straight should a knock or impact occur. The Schaefer Marine Great Hawk Wind Indicator f/Boats From 8M is easily removed from its mounting bracket with one screw for quick adjustment on the go. Specifications for Schaefer Marine Great Hawk Wind Indicator f/Boats From 8M: Manufacturer: Schaefer Marine Color: Hawk Package Contents: Schaefer Marine Great Hawk Wind Indicator f/Boats From 8M Schaefer Marine H002F00: Great Hawk Wind Indicator f/Boats From 8M - 20M