Built for serious underwater treasure hunting, the Fisher 1280-X Aquanaut is a rugged, fully submersible metal detector designed for detecting in saltwater, freshwater, surf, beaches, and on land.

Operating at 2.4 kHz, the 1280-X combines straightforward analog controls with adjustable discrimination, automatic ground compensation, long battery life, and a waterproof design rated for depths of up to 250 feet.

This configuration features the larger 10" search coil, providing excellent ground coverage for beaches, shorelines, diving, and open-water searching.

With no complicated programming or menus to navigate, the 1280-X is a dependable choice for detectorists who want a purpose-built underwater detector that is easy to set up and operate.

Key Features

• Fully Submersible to 250 Feet – Designed for serious underwater detecting, including diving, surf hunting, and shallow-water recovery.

• Saltwater, Freshwater & Land Operation – One detector can be used across beaches, lakes, rivers, shorelines, and terrestrial hunting sites.

• 10" Concentric Search Coil – Provides broad ground coverage for open beaches, underwater searching, and general treasure hunting.

• 2.4 kHz Operating Frequency – Quartz-crystal-controlled circuitry provides stable VLF operation.

• Adjustable Discrimination – Reduce responses from unwanted metallic trash while continuing to search for desirable targets.

• Adjustable Sensitivity – Fine-tune detector sensitivity according to ground conditions and target response.

• Automatic Ground Compensation – Designed for straightforward operation without complicated manual ground adjustments.

• Slow-Motion Search System – Provides a clear target response as the search coil moves across a metallic object.

• Audio Target Response – 400 Hz unipolar audio provides clear audible target indication.

• Visual LED Target Response – A red LED flashes when a target is detected.

• Waterproof Headphones – Purpose-built headphones allow underwater target responses to be heard clearly.

• Hip-Mountable Control Housing – Remove the control housing from the shaft and wear it on a belt to reduce arm fatigue.

• Long Battery Life – Provides approximately 60 to 80 hours of operation with alkaline batteries.

• Simple Analog Controls – Dedicated Volume, Sensitivity, and Discrimination controls make field adjustments quick and straightforward.

Who Is the Fisher 1280-X Aquanaut Best For?

The Fisher 1280-X Aquanaut is particularly well suited for detectorists who spend a significant amount of time around water.

It is a strong choice for:

• Underwater treasure hunting

• Scuba diving

• Beach detecting

• Saltwater hunting

• Freshwater hunting

• Lakes and rivers

• Surf and shoreline detecting

• Swimming areas

• Jewelry recovery

• Coin hunting

• Detectorists who prefer straightforward analog controls

Its ability to operate fully submerged to 250 feet makes the 1280-X considerably different from detectors that only offer a waterproof search coil or shallow-water capability.

Built for Underwater Detecting

The defining feature of the Fisher 1280-X is its fully submersible construction.

The detector is designed for underwater operation to depths of up to 250 feet, making it suitable for everything from shoreline hunting to serious diving.

It can be used in:

• Saltwater

• Freshwater

• Surf

• Lakes

• Rivers

• Swimming areas

• Beaches

• On land

This makes the Aquanaut a versatile choice for detectorists who regularly move between underwater and shoreline environments.

10" Search Coil

This configuration of the Fisher 1280-X features the larger 10" concentric search coil.

The larger coil provides increased ground coverage with each sweep, making it particularly useful when searching:

• Open beaches

• Lake bottoms

• Swimming areas

• Large underwater locations

• Shorelines

• Relatively open land

The search coil is matched to the detector at the factory for stable operation.

2.4 kHz VLF Operation

The Fisher 1280-X operates at a 2.4 kHz quartz-crystal-controlled search frequency.

Its circuitry is designed specifically around underwater and general treasure hunting applications.

Rather than requiring complicated digital programming, the detector provides direct control over the settings that matter most during a hunt.

Adjustable Discrimination

The 1280-X includes a 0–10 adjustable discrimination control.

At the lowest setting, the detector responds to a broad range of metallic targets.

Increasing discrimination allows unwanted targets to be progressively rejected.

This can help reduce time spent recovering common trash when searching:

• Beaches

• Swimming areas

• Parks

• Shorelines

• Recreation areas

Because valuable targets such as jewelry can overlap with trash conductivity ranges, lower discrimination settings may be preferable when maximum target recovery is the priority.

Adjustable Sensitivity

Sensitivity is adjustable to match the current hunting environment.

Higher settings provide greater sensitivity when conditions allow.

If the detector becomes noisy or unstable, sensitivity can be reduced until operation becomes smooth.

This simple control system allows the 1280-X to be adapted without navigating complicated menus.

Automatic Ground Compensation

The Fisher 1280-X is designed for straightforward turn-on-and-go operation.

Its automatic ground compensation eliminates the need for frequent manual ground-balance adjustments.

This is particularly convenient when moving through aquatic environments where the detectorist needs to concentrate on coil control, target recovery, and changing water conditions rather than continuously adjusting detector settings.

Slow-Motion Detection

The 1280-X is a motion detector during normal searching.

The search coil needs to remain in motion to produce a target response.

A moderate, controlled sweep is recommended. Excessively fast sweeping can actually reduce sensitivity.

Overlapping each sweep helps prevent targets from being missed between passes.

Audio and Visual Target Response

Targets produce a 400 Hz unipolar audio response through the detector's headphones.

The 1280-X also provides a visual target indication using an LED on the control housing.

When a target is detected, the LED flashes red.

This combination gives the operator both audible and visual confirmation of detected metal.

Waterproof Headphones

The 1280-X uses purpose-built waterproof headphones for underwater operation.

The headphones allow target responses to remain audible when detecting below the surface, where a conventional external speaker would not be practical.

The headphone system is integrated into the detector and is not designed as a conventional interchangeable headphone connection.

Hip-Mountable Control Housing

For longer hunts, the 1280-X control housing can be removed from the detector handle and attached to a belt using the integrated hip-mounting arrangement.

Moving the control housing away from the shaft reduces the weight carried by your detecting arm.

This can be particularly useful during extended:

• Beach hunts

• Shoreline searches

• Shallow-water detecting

• Land detecting sessions

Long Battery Life

The Fisher 1280-X operates on eight AA batteries.

Approximate battery life is:

• 60–80 hours with alkaline batteries

• 30–50 hours with carbon-zinc batteries

Actual operating time can vary according to battery condition and usage.

The detector also provides a battery-test function for checking remaining battery strength before a hunt.

Simple Analog Control System

One of the strengths of the 1280-X is its uncomplicated control layout.

Primary controls include:

Power / Volume
Turns the detector on or off and adjusts target-response volume.

Discrimination
Controls the level of unwanted-target rejection.

Sensitivity / Battery Test
Adjusts detector sensitivity and provides a quick battery-condition check.

There are no complicated digital menus or extensive programming sequences required before detecting.

Technical Specifications

Specification	Details
Brand	Fisher
Model	1280-X Aquanaut
Configuration	1280X-10
Product Type	Underwater Metal Detector
Technology	VLF
Operating Frequency	2.4 kHz, Quartz Crystal Controlled
Search Coil	10" Concentric Search Coil
Search Coil Type	Concentric, Co-Planar
Search Mode	VF Discrimination, Slow Motion
Discrimination	Adjustable 0–10
Sensitivity	Adjustable
Ground Compensation	Automatic
Numeric Target ID	No
Visual Target Response	LED
Audio Target Response	400 Hz Unipolar
Pinpoint Mode	No Dedicated Electronic Pinpoint Mode
Saltwater Operation	Yes
Freshwater Operation	Yes
Land Operation	Yes
Maximum Submersion Depth	250 Feet
Hip Mounting	Yes
Headphones	Waterproof, Integrated
Battery	8 × AA
Alkaline Battery Life	Approx. 60–80 Hours
Carbon-Zinc Battery Life	Approx. 30–50 Hours
Collapsed Length	Approx. 33"
Complete Weight	Approx. 5.4 lbs with Headphones

What's Included

• Fisher 1280-X Aquanaut Underwater Metal Detector

• 10" Search Coil

• Waterproof Headphones

• Shaft and stem assembly

• Armrest assembly

• Belt clip for hip mounting

• Search coil mounting hardware

• User documentation

Batteries: Requires eight AA batteries.

Why Choose the Fisher 1280-X Aquanaut?

The Fisher 1280-X Aquanaut is designed around a straightforward purpose: dependable treasure hunting in environments where ordinary metal detectors cannot safely operate.

Its 250-foot submersible design makes it suitable for serious underwater hunting, while saltwater, freshwater, beach, and land compatibility allow it to be used across a wide variety of sites.

The larger 10" search coil provides efficient ground coverage, while adjustable discrimination and sensitivity let you tailor the detector to the conditions you're searching.

There is no complicated digital interface to learn. Set your sensitivity, discrimination, and volume, then start hunting.

For detectorists searching beaches, swimming areas, lakes, rivers, shorelines, or underwater sites, the Fisher 1280-X Aquanaut remains a purpose-built solution for taking the hunt well beyond the water's edge.