Garrett Sea Hunter Mark II Review

Very Good
Metal Detector
  • Country USA
  • Released -
  • Warranty 2 year
  • Additional
  • Headphones included

Best for

  • Beach
  • Underwater

Are you looking for an excellent metal detector? Then Garrett Sea Hunter Mark II should be your choice. There are so many metal detectors to choose from and each carries features that are really amazing. One of the underwater metal detectors that you can try is the Garrett Sea Hunter Mark 2.

The Garrett Sea Hunter Mark II is designed specifically for the underwater search. It is on the more expensive side, and also has a bunch of complicated settings to tune, but the user experience is excellent, while the search efficiency is next to unbelievable. To find out about the main pros and cons, check this Garrett Sea Hunter Mark II review.

Rating Explanations
All Purpose
Key Features
Easy to Use
Reviewed by
Michael Moore
  • The user can safely dive with this piece of equipment even in deeper locations, as the device can be mounted conveniently, which makes it easy to manipulate and hard to lose.
  • This model is definitely worth the money, even if somebody may find it not very budget-friendly. The main point here is quality and reliability, since diving is itself a complicated activity, and diving with a flimsy and poorly functioning tool just makes no sense.
  • The battery life is pretty long, so you can use it underwater for extended periods of time without losing the efficiency in indications.
  • The only concern about this metal detector is its installed battery, and the reason is that installed one can be isolated properly. However, this is generally it.
  • Technology: PI (Pulse Induction)
  • Frequencies: 22
  • Search Coil: 8"
  • Waterproof: Up to 200 feet
  • Updatable Software: No
  • VDI (Target ID): No
  • Search Modes: 3
  • Ground Balance: No
  • Pinpoint Mode: No
  • Audio Tones: 1
  • Batteries: 8 AA batteries required
  • Weight:5.07 lb
  • Warranty: 2 years

Garrett Sea Hunter Mark II Key Features

Pulse Induction Technology

Allows to spot all targets that get magnetized by the electromagnetic field created with short impulses sent into the coil.

22 Operating Frequencies

Incredible range of opportunities for successful detecting, which is especially valuable in harsh underwater conditions.

Mono Coil

While such configuration requires more overlapping, monoloop coils can provide even better depth of reach that DD shaped coils.

High Level of Discrimination

Irreplaceable feature for treasure hunting in salty and highly mineralized waters.


Up to 200 feet is an impressive level of waterproofness that allows a wide range of underwater locations for exploration.

Three Parts Shaft

Easy and safe to mount on hip or chest for comfortable diving and freedom of movement underwater.

Garrett Sea Hunter Mark II Overview

Sea Hunter Mark II has the reputation of one of the most reliable and sophisticated underwater metal detectors in the niche. It is lightweight, durable, easy to use (although a certain learning curve is present!), and provides an excellent balancing to avoid false signals caused by salty water.

Sea Hunter Mark II is versatile both in terms of hardware, and in terms of software. You can mount it as you find comfortable, and apply its Pulse Induction Technology with 22 operating frequencies even to the most complicated locations.

Control Panel

Since the machine is submersible, the control panel has no display – anyways it is unlikely to be much useful underwater. Instead, the control panel has Minimum and Maximum Threshold setting, Elimination and Trash Elimination, Headphones connecter,  and Power. The good news is that the controls are easy to manipulate; on the other hand, the user has to totally depend on the audio signal to interpret what kind of target they have.


Mono coil provides an enhanced depth of reach, in contrast to many DD coils, and under the conditions of underwater search, enhanced depth is definitely a benefit.


The design is obviously a little bit more bulky than one would want to handle underwater, but this is inevitable for the tasks this metal detector was created to manage. On the other hand, collapsible shaft and various options of mounting make this machine sometimes more convenient than many hand-held detectors.

Search Modes

Sea Hunter Mark II is kinda special, so it does not have those standard search modes one could expect. Moreover, such standard modes would have been useless in the conditions under which Mark is created to operate. Instead, there are two special search modes that experts will definitely take advantage of.

Standard Trash Elimination

This search mode is similar to other pulse induction metal detectors. In this mode, the background audio threshold remains continuous and responding to variations of the targets’ response. Smaller and deeper targets give smaller signals, while bigger and closer targets give loud, clean signals.

Discrete Trash Elimination

This search mode is exclusive for Sea Hunter Mark II. It works more like in many motion types of detectors - the background audio remains continuous, but when the potential target is detected, the machine gives a sharp clear sound.

Product Features

Customer Reviews and Scores

The Garrett Sea Hunter Mark II was developed specially for expert divers who are fond of searching for valuable materials underwater.

This tool gives an excellent user experience and is safe and operable underwater. The majority of owners are totally happy with this instrument, using it for years. The model is highly demanded on the market, enjoys positive feedback from buyers, and gets often recommended to other fans of underwater metal detecting due to it efficiency and functionality.


Garrett Sea Hunter Mark II metal detector is excellent for lengthy underwater search. It is a really good and reliable option for those divers who are fond of searching underwater, especially in deeper places. In case you are looking for a good machine, opt for Garrett Sea Hunter Mark II and it will never disappoint you.


Garrett Sea Hunter Mark II Perfect for underwater metal detecting


Michael Moore

Hi detectorists! I’m Michael Moore, founder of this website, and a dedicated treasure hunter since 2013. If you want to be posted about the most recent news and updates in metal detecting, releases, and trends, subscribe!

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