Raymarine RVM-4 Thru-Hull Pair Stainless Steel.

Raymarine RVM‑400 Series Through‑Hull Transducer Pairs
Stainless Steel RealVision MAX Sonar for Axiom 2 Pro RVM and RVM1600 Modules

The Raymarine RVM‑400 Series transducers bring the power of RealVision MAX™ sonar technology to hard‑hulled powerboats with inboard or outboard engines. These all‑in‑one through‑hull transducers deliver DownVision™, SideVision™, 600 W High CHIRP, and 3D sonar imaging, paired with built‑in motion stabilization and fast temperature sensing for the most accurate picture below the waterline.

Made from rugged stainless steel, each pair features tilted‑element designs precisely matched to the vessel’s deadrise for clean flow and optimized beam alignment — no fairing block required. Both include 8 m extensions and a Y‑cable harness for straightforward installation and integration with Raymarine RVM1600 sonar modules or Axiom 2 Pro RVM chartplotters.

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Model Numbers

- RVM‑420 Transducer Pair (20° Offset) – Model: T70544
- RVM‑412 Transducer Pair (12° Offset) – Model: T70543

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Key Features

- All‑in‑one RealVision MAX™ transducers with DownVision™, SideVision™, High CHIRP and 3D modes.
- Integrated AHRS (Attitude and Heading Reference System) stabilizes 3D sonar images.
- Fast‑response temperature sensor for accurate readings.
- Tilted ceramic elements align beam patterns for deadrise angles of 5°–25°.
- Hydrodynamic low‑profile housing minimizes drag and turbulence.
- Works with fiberglass, wood, and metal hulls.
- Includes Y‑Cable and 8 m extension for easy connection to RVM systems.

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Model Comparison

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Technical Specifications

- Sonar Functions: DownVision™, SideVision™, High CHIRP (600 W), 3D sonar
- Construction: Stainless steel, surface‑mount, low drag
- Deadrise Support: 5° – 25° (hull dependent) 
- Cable Type: 2 m Y‑Cable + 8 m Extension (10 m total)
- Dimensions: Length 424.7 mm (16.7 in) | Width 79.6 mm (3.1 in)
- Hull Material Compatibility: Fiberglass, wood, metal

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What’s in the Box

RVM‑420 (T70544):
- RVM‑420 Port Transducer
- RVM‑420 Starboard Transducer
- 2 m Y‑Cable Harness
- 8 m Extension Cable

RVM‑412 (T70543):
- RVM‑412 Port Transducer
- RVM‑412 Starboard Transducer
- 2 m Y‑Cable Harness
- 8 m Extension Cable