The Raymarine ST300 Thru-hull Shorty™ is among the most compact and affordable thru-hull speed sensors in the lineup. Engineered for vessels with limited bilge headroom, it comes with two plastic outer housing options: the P371 low-profile housing sits nearly flush with the hull and extends just 5 mm (3/16") below the surface to minimize drag, while the P398 countersunk housing mounts completely flush to eliminate turbulence and deliver more accurate speed data.

Specifications:

• Series: Shorty™ — designed for boats with low headroom
• Type: Thru-hull speed sensor
• Compatible models: S300 / ST300
• P371 outer housing: low-profile plastic, nearly flush mount, 5 mm (3/16") hull protrusion, minimizes drag
• P398 outer housing: countersunk plastic, fully flush mount, eliminates turbulence for improved speed accuracy