What’s the difference between a chartplotter and a fishfinder?

A chartplotter shows your GPS position on electronic charts for navigation. A fishfinder uses sonar to show what’s below the boat — depth, bottom structure, and fish. Many modern units combine both, and networked systems can share data across displays.

Do I really need a VHF radio?

For safety, yes. A VHF radio is the primary way to reach other vessels and the Coast Guard, and a DSC-equipped VHF connected to GPS can transmit your position in an emergency. It’s more reliable than a cell phone offshore and is the recognized standard for marine distress calls.

What is NMEA 2000 and do I need it?

NMEA 2000 is a standard network that lets marine electronics — chartplotter, sonar, autopilot, sensors, engine data — share information over a single backbone. It’s not required for a simple setup, but it makes multi-device systems far easier to expand and integrate.

Click to enlarge

Airmar

Airmar B765C-LM Bronze CHIRP Transducer - Needs Mix & Match Cable - Does NOT Work w/Simrad & Lowrance

Manufacturer: AirmarPart #: B765C-LM-MMSKU: 71947

300W
85 kHz
Thru Hull
Bronze

$1498.91$1649.99Save $151.08 (9%)● In stock

Item #: 71947

Category: Transducers

● In stock — ships fast from US warehouses

Ships from US warehouses
Free shipping on orders over $99
Secure checkout — your info is protected
Genuine marine-brand parts, not knockoffs
30-day returns
Marine parts support — we know boats

Description

B765C-LM Bronze CHIRP Transducer - Needs Mix & Match Cable - Does NOT Work with Simrad & Lowrance Rely on Airmar’s broadband transducers for your ultimate fishing mission. Whether you’re a commercial fisherman, charter captain, or tournament angler, there’s a new game in town!

Chirp transducers enable bottom detection down to 3,000m (10,000’) with 5 to 10 times greater detail and resolution so precise it’s possible to distinguish between individual baitfish, game fish, and underwater structures. One transducer delivers up to 85 kHz of total bandwidth in just one installation, saving customers time and money.

A Thru-Hull Chirp transducer perfectly suited for smaller fishing boats, the B765L/M Chirps across the following bandwidths:*L/M -Low Frequency 40-75 kHz, Medium Frequency 80-130 kHz * Please Note: The low frequency operating band is 300 W. The medium frequency operating band is 600 W.

Features Depth & fast-response water-temperature sensor Low—CHIRPS from 40 kHz to 75 kHz, 32° to 21° beamwidth Medium—CHIRPS from 80 kHz to 130 kHz, 24° to 16° beamwidth 85 kHz of total bandwidth from one transducer Covers popular fishing frequencies of 50, 88, and 107 kHz plus everything else in the bandwidth All the advantages of the larger Thru-Hull Chirp transducers, suitable for smaller boats Bronze transducer housing with High-Performance Fairing Boat Size: Up to 9 m (30’) and above Hull Type: Fiberglass or wood Exclusive Xducer ID® technology Hull Deadrise: Up to 24° with a fairing Acoustic Window: Urethane Weight: 2. 5 kg (5.

5 lb) This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.

Specifications

Brand	Airmar
Part Number	B765C-LM-MM
EverTide SKU	71947
Power	300 W
Frequency	85 kHz
Mount	Thru Hull
Material	Bronze

Specifications are provided by the manufacturer. Confirm fitment for your application before ordering, or contact us and we'll help.

Compare similar products

	Airmar B765C-LM Bronze CHIRP Transducer - Needs Mix & Match Cable - Does NOT Work w/Simrad & Lowrance$1498.91You're viewing	Airmar 599 Low/High Frequency - In-Hull Chirp Transducer w/o Connector$6599.00	Airmar B150M Bronze 20 Degree Thru-Hull 300W 8-Pin$459.99	Airmar B164 Bronze Thru-Hull - 50/200 kHz - 1 kW - 12° Tilted Element - Requires Mix & Match Cable$1264.00
Power	300 W	—	300 W	600 W
Frequency	85 kHz	112 kHz	155 kHz	50/200 kHz
Connector	—	—	8-pin	9-pin
Mount	Thru Hull	In Hull	Thru Hull	Thru Hull
Material	Bronze	—	Bronze	Bronze

Complete your setup

Airmar

Airmar 599 Low/High Frequency - In-Hull Chirp Transducer w/o Connector

$6599.00

Airmar

Airmar B150M Bronze 20 Degree Thru-Hull 300W 8-Pin

$459.99

Airmar

Airmar B164 Bronze Thru-Hull - 50/200 kHz - 1 kW - 12° Tilted Element - Requires Mix & Match Cable

$1264.00

Airmar

Airmar B164 Bronze Thru-Hull - 50/200 kHz - 1 kW - 20° Tilted Element - Requires Mix & Match Cable

$1264.00

Returns & warranty

Returns are accepted within 30 dayson items that are unused and in their original packaging. Some items may be subject to a manufacturer restocking fee. Special-order items may not be eligible — if you're unsure, ask us before ordering.

Airmar productscarry the manufacturer's standard warranty. For a warranty claim or a return authorization, see our full returns policy or contact us.

Marine Navigation & Instruments — frequently asked

What’s the difference between a chartplotter and a fishfinder?: A chartplotter shows your GPS position on electronic charts for navigation. A fishfinder uses sonar to show what’s below the boat — depth, bottom structure, and fish. Many modern units combine both, and networked systems can share data across displays.
Do I really need a VHF radio?: For safety, yes. A VHF radio is the primary way to reach other vessels and the Coast Guard, and a DSC-equipped VHF connected to GPS can transmit your position in an emergency. It’s more reliable than a cell phone offshore and is the recognized standard for marine distress calls.
What is NMEA 2000 and do I need it?: NMEA 2000 is a standard network that lets marine electronics — chartplotter, sonar, autopilot, sensors, engine data — share information over a single backbone. It’s not required for a simple setup, but it makes multi-device systems far easier to expand and integrate.

Customer reviews

No reviews yet — this product.

Fast shipping

Ships from US warehouses — free over $99

The right part

Marine-grade parts matched to your boat

Real support

Questions? We know boats — call or email