New Horizon E78 Launches With Added Feature Horizon Yachts formally announced that they have launched another E78. However, this one comes with a difference. Besides being targeted for the U.S market, it has some Hi-Lo features to it. A hydraulic Hi-Lo hardtop and folding radar mast are the new features added. They were designed in-house by Horizon’s naval architects and engineers. This Hi-Lo hardtop utilizes a custom hydraulic system to lower the height of the yacht from 28’11” to 20’5”, allowing the yacht to easily cruise under fixed-height bridges like those found in the Great Lakes region; the folding radar mast can also be lowered separate of the hardtop if desired.