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.

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Airmar

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

Manufacturer: AirmarPart #: B150C-20-M-8GSKU: 109063

300W
155 kHz
8-pin
500 ft
20°
Thru Hull

$459.99$509.99Save $50.00 (10%)● In stock

Item #: 109063

Category: Transducers

● In stock — ships fast from US warehouses

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Description

B150M Bronze 20 Degree Thru-Hull 300W 8-Pin As CHIRP continues to redefine recreational fishing, AIRMAR has expanded its lineup of broadband transducers to satisfy the growing demand for this game-changing technology. New to the market is AIRMAR’s B150C-M, an economical CHIRP transducer designed for anglers with a focus on inland or freshwater fishing with ultra-clear target resolution.

Operating at a frequency range of 95-155 kHz, the B150C-M delivers a sweet spot for fishing in shallow waters and medium depths (up to 2,500 feet*) along with ultra-clear target resolution. The transducer’s precise sweep pattern of the medium frequency results in an expanded viewing area with larger and clearer images of the fish displayed on the echo sounder.

Features: Medium Frequency Only Depth & fast-response water temperature Depths vary depending on target strength and sea conditions 60 kHz of total bandwidth from one transducer Medium-Frequency (M) Medium—Chirps from 95 kHz to 155 kHz, 26° to 17° beamwidth Covers popular fishing frequency of 107 kHz, plus everything else in the bandwidth Fishing Profile: Recreational, medium depths, inland, and freshwater Bronze B619 housing Hull Type: Fiberglass or wood Supported Deadrise/Transom Angles - 0-7° Deadrise 1 internal ceramic Fits: Garmin xs Series

Specifications

Brand	Airmar
Part Number	B150C-20-M-8G
EverTide SKU	109063
UPC	801769000856
Power	300 W
Frequency	155 kHz
Connector	8-pin
Mount	Thru Hull
Material	Bronze
Cable Length	500 ft
Beam Angle	20°

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

Compare similar products

	Airmar B150M Bronze 20 Degree Thru-Hull 300W 8-Pin$459.99You're viewing	Airmar 599 Low/High Frequency - In-Hull Chirp Transducer w/o Connector$6599.00	Airmar B164 Bronze Thru-Hull - 50/200 kHz - 1 kW - 12° Tilted Element - Requires Mix & Match Cable$1264.00	Airmar B164 Bronze Thru-Hull - 50/200 kHz - 1 kW - 20° Tilted Element - Requires Mix & Match Cable$1264.00
Power	300 W	—	600 W	600 W
Frequency	155 kHz	112 kHz	50/200 kHz	50/200 kHz
Connector	8-pin	—	9-pin	9-pin
Mount	Thru Hull	In Hull	Thru Hull	Thru Hull
Material	Bronze	—	Bronze	Bronze

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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.

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