Maretron 1.25" BSM Non-Displac Hull Focus Tube

The Maretron 1.25" BSM Non-Displacement Hull Focus Tube is designed for serious cruising anglers and commercial boaters who require reliable depth and fish-finding data without making hull modifications. This non-invasive through-hull solution is ideal for vessels where drilling or permanent installation isn't practical.

Engineered with a 1.25-inch barrel diameter, the BSM non-displacement design can be mounted externally or in existing thru-hull cavities, preserving hull integrity while maintaining acoustic signal clarity. Its lightweight construction of 3 pounds facilitates straightforward installation and repositioning.

This transducer tube is best utilized with Maretron TSM and BSM series chartplotters and networked marine instruments, making it essential for captains operating integrated glass cockpit systems. Whether navigating shallow coastal waters or deep offshore grounds, this focus tube delivers consistent sonar performance.