P319 Depth/Temp Plastic Thru-Hull Transducer (Low-Profile)

The Raymarine P319 is a low-profile plastic thru-hull transducer for depth and temperature, and it’s a top choice when you need performance without a bulky installation. With its urethane housing and nearly flush design, the P319 creates virtually no drag in the water – once installed, it sticks out only about 5 mm (0.2″) from the hull. This makes it ideal for high-speed motorboats and sailboats where minimizing turbulence and resistance is crucial, as well as for trailered boats (there are no protruding parts to snag during launch or transport).

Operating on dual frequencies (50 kHz and 200 kHz), the P319 uses a single ceramic element capable of wide-spectrum CHIRP operation. At 200 kHz, the transducer yields a narrow ~11° beam for precise readings in shallow and mid-depth waters, whereas at 50 kHz it offers a wider ~45° beam to reach deeper depths. Depth capability is roughly 700 ft (213 m) on 200 kHz and 1,200 ft (366 m) on 50 kHz, covering most coastal fishing and navigation scenarios. With its 600W power, the P319 is compatible with all of Raymarine’s standard 600W sonar systems, providing steady bottom tracking and fish detection across its range.

Installation of the P319 is relatively straightforward: it’s installed from inside the hull, protruding out the bottom. Its design accommodates hull deadrise angles up to 8° without fairing or shims, since the internal element is slightly tilted within the housing. This covers flat to mildly V-shaped hulls (for steeper deadrise, Raymarine offers tilted element models or the use of an external fairing). Importantly, the hull should be solid – the P319 is not recommended for cored hulls (foam or wood sandwich construction) because the sonar signal can be dampened passing through such material. On fiberglass and metal hulls, the P319 performs excellently – the plastic body electrically isolates the transducer to prevent corrosion on metal boats, and on fiberglass it ensures a secure, watertight seal. The standard model handles hull thicknesses up to 5/8″ (~16 mm).

The P319 features a fast-response water temperature sensor, providing accurate live temperature data. This is beneficial for anglers (to find thermoclines or temperature breaks that attract fish) and for environmental monitoring. In terms of connectivity, the P319 typically comes with an 8-pin “DSM” style plug, as it was designed to plug directly into Raymarine’s CP370 sonar module or earlier DSM300/DSM30/DSM250 digital sounder modules. Many users have paired the P319 with legacy C-Series and E-Series chartplotters via those modules. If integrating with newer MFDs (like Axiom or Element that use a different connector or network), Raymarine offers adapter cables or the P319S smart version (which outputs to NMEA2000/SeaTalkNG).

In summary, the P319 is a discreet yet powerful solution for those who want depth and temperature readings without compromising on speed or hull integrity. It gives your boat an accurate sonar “eye” on the bottom – even at planing speeds – and reliable water temperature info, all from a single nearly invisible sensor.