“H” stands for horizontal mounting on a flat surface, either bolted or via track system. 106 cm pole reaching approx. 106 cm below the gunwale. Single ball joint for stability and precise vertical alignment. Made in the USA, engineered in Sweden. Complete live transducer kit with 360° rotation, adjustable height, quick-release, split pole, and adjustable rotation resistance with locking. Rubber ball protects the transducer from impact. Powder-coated marine-grade aluminum with RAM ball system for full adjustability. Foldable for transport inside the gunwale. Tested up to 4 knots, stable when properly mounted. Can be reinforced with RAM support (e.g. RAP-400-201). Extendable handle: RAP-BB-230-14 / RAP-BB-230-18. Track mounting: RAM-HAR-xxx + RAM-B-337U or carriage bolts.