What is the maximum height above the waterline to the top of the HF antennae?

What is the maximum height above the waterline to the top of the HF antennae?

• A. 10 feet 2 inches
• B. 9 feet 9 inches
• C. 11 feet 8 inches
• D. 12 feet-0 1/2 inches

Answer: (D)

The height limit for the top of an HF antenna above the water is set to 12 feet 0 1/2 inches. This upper bound keeps the antenna from extending too high, which helps ensure the vessel can pass under typical bridges and overhead obstacles, reduces wind loading and stress on the mast, and keeps the boat’s air draft within reasonable limits. You may install and operate up to that height, but not above it. The other options are shorter than the maximum, so they would be within the limit but not the highest allowable height.

The height limit for the top of an HF antenna above the water is set to 12 feet 0 1/2 inches. This upper bound keeps the antenna from extending too high, which helps ensure the vessel can pass under typical bridges and overhead obstacles, reduces wind loading and stress on the mast, and keeps the boat’s air draft within reasonable limits. You may install and operate up to that height, but not above it. The other options are shorter than the maximum, so they would be within the limit but not the highest allowable height.