Instruments

About Instruments

Marine Instruments

Sailing navigation is made easy with a variety of electronics offered by Defender. Marine navigation tools, bundles, and a full line of accessories cover all boat navigation needs. Multifunction marine instruments offer an alternative when installation space and budget are tight.

Which marine instruments are important to sailing?

Anyone on the water can benefit from as much information as possible but it could be argued that sailing navigation and wind indicators are the essentials to skippers on sailboats. Depth finders and speed monitors might be seen as sailing frivolity, but any sailor would be happy to have these marine instruments in their electronics package.

Sailing into the wind

Technically there is no such thing. Sailing directly into the wind cuts down the angle and doesn't allow the sails to capture the wind, which propels the boat. Here's where sailing navigation tools and packages come into play. Wind indicators monitor the strength and direction of the wind while navigating correctly to capture the wind is essential.

How to navigate your cruise

Here's where depth finders, plotters, and temperature gauges become a more important part of your sailing navigation package. Cruising on your sailboat means less about wind and more about other boats, obstacles, and, of course, finding your way home. Defender Marine offers full sailboat navigation packages and multifunction marine electronics units for the family sailboat and the competitive team!

Instruments

Airmar Replacement Blanking Plug Assembly with Valve - 33-482-01

Airmar P17 Plastic Low-Profile Housing - 33-417

Airmar P398 Shorty Sensor Speed/Temperature Taper-Flush Housing - 33-444-02

Airmar Shorty Sensor Speed/Temperature Low-Profile Housing - 33-361-01

Airmar ST300 Shorty Blanking Plug Assembly - 33-386-01

Airmar P65/ST69 Transducer Paddlewheel Kit - 33-398-01

Airmar Raymarine ST600 Spare Wheel Kit - 33-250

Airmar B120 Bronze Low-Profile Housing - 33-340-01

Airmar S300/ST300 Spare Paddlewheel Kit - 33-350-01

Airmar P8 Shorty Sensor Low-Profile Housing - 33-360-01

Airmar B55 Speed Only Thru-Hull Triducer Spare - 33-125

Airmar P217 Plastic Flush Mount Housing - 33-217

Airmar P317 Plastic Taper-Flush Housing - 33-092-01

Airmar B17 Bronze Housing - 33-100

Airmar ST-550/100 Spare Wheel Kit - 33-108

Airmar S63/P37/P52 Spare Wheel Kit - 33-110

Airmar ST-200 Spare Wheel Kit - 33-114

Airmar Replacement Blanking Plug Assembly without Valve - 33-486-01

Airmar Wiring Box with Screw Terminals - 33-035-BOX

Airmar ST600 Blanking Plug Assembly - 20-600

Airmar ST650 Valve Assembly - 20-603

Airmar DT800 Bronze Installation Kit - 20-398-02

Airmar ST800 Installation Kit - 20-410-01

Airmar Stuffing Tube Bushings - 20-488-01

Airmar 33-108 Wheel Kit Replacement Paddlewheel - 20-301-01

Airmar Snap-In Smart Sensor Cap - 20-386-03

Airmar 33-113/33-114 Paddle Wheel Kit Replacement Shaft - 01-088-5

Airmar DX900 Installation Kit and Housing - 20-1256-01

Airmar DX900+ Thru-Hull Smart Electromagnetic Speed Sensor - DX900-ST-0

Airmar P32 Transom Mount DST Triducer - P32-200-VDO

Airmar 33-108 Paddle Wheel Kit Replacement Shaft - 01-088-1

Airmar 33-114 Spares Kit O-Ring - 09-145

Airmar 33-108 Spares Kit O-Ring - 09-146

Airmar B17/B617/DT800 Replacement Rubber Washer - 09-452

Airmar P79 In-Hull Transducer O-Ring - 09-518-18

Airmar WeatherStation Cable Adapter - 04-564-03

Airmar WeatherStation USB Interface Box - WS-USB

Airmar P66 Plastic Cover Assembly - 04-349-02

Airmar P79 Replacement Mounting Base and Locking Ring - P79-FL

Airmar P79 Replacement Screw Pack - P79-SCREWPACK

Raymarine i70 Sail Pack with ST900/P120 and D800 Thru-Hull Transducers - T70586

Raymarine ST900/P120 Thru-Hull Transducer

Raymarine ST950/P17 Speed and Temperature Transducer - E70687

Raymarine ST900 Paddle Wheel Replacement Kit - R70961

Raymarine ST950 Paddle Wheel Replacement Kit - R70972

Raymarine i50 Tridata System with ST900/P120 and P319 Retractable Thru-Hull Transducers - T70582

Raymarine i50 Speed System with ST900/P120 Retractable Speed/Temp Thru-Hull Transducers - T70583

Raymarine i50/i60 Sail Pack Wind Depth and Speed System - T70584

About Instruments

Marine Instruments

Which marine instruments are important to sailing?

Sailing into the wind

How to navigate your cruise

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