Davis Artificial Horizon [144] Sheave 18 Mast collar secured with a

Mast collar secured with a hook-and-loop closure

Stainless Steel Flush Mount Rod Holder

Thickness: 3/16" (4mm)

Width: 2 3/8 in

two custom display modes may be programmed by the operator

Davis Artificial Horizon [144] Sheave 18 Mast collar secured with aArtificial Horizon Answers the need of every sextant user who cannot depend on a natural sea horizon. Use for backyard practice, finding exact positon when inland, and making exact sextant shot on foggy mornings. To use, fill with water and read the angle of the reflected sun with your sextant. Half your sextant reading is the sun's angle above the true horizon. Windproof and corrosion resistant, the reflecting surface is completely enclosed. Comes