Sierra 18-9139-9 Oetiker Clamp 1-5/8", 10/bag PVTHRU3 5" diameter base with 3/8"-16

5" diameter base with 3/8"-16 female threaded hole

Add FrontVü forward-looking sonar (sold separately) (The ability to effectively avoid forward collisions with FrontVü sonar decreases as speed rises above 8 knots) which can help in avoiding underwater obstructions ahead

Hardware and HELIX 5 & HELIX 7 Gimbal mounts included to convert your existing transducer and control head to portable use

When it's time to remove the whip hose

The low-profile RAILBLAZA StarPort base means you can easily remove your fish finder and have it stowed away safely in no time at all

Sierra 18-9139-9 Oetiker Clamp 1-5/8", 10/bag PVTHRU3 5" diameter base with 3/8"-16SS Clamps