Underwater Camera HDMI: Seavu Explorer+ Adventure Kit

  • Read Time: 7 mins

Released 8 December 2025, the groundbreaking DisplayPort to HDMI underwater viewing system for live video on TVs, monitors, computers, and chartplotters.

If you have ever tried to get a real time view from an action camera underwater, you already know the problem. Most action cameras are designed for recording, not for sending a clean video out signal while they are submerged. That is exactly why the Seavu Explorer+ Adventure Kit is so exciting. It delivers a true underwater camera HDMI connection, so you can view live underwater video on a TV, monitor, computer, or compatible chartplotter, including popular marine brands like Simrad, Garmin, and Lowrance.

This kit is groundbreaking because it brings stable, long range, high quality underwater live viewing to screens using a purpose built underwater housing and a fibre optic HDMI media cable system, designed around modern DJI cameras.

Product page: https://seavu.com/product/explorer-plus-adventure-kit/

What does “underwater camera HDMI” actually mean

When people search underwater camera HDMI, they usually want one of these outcomes:

  • Live underwater video on a boat monitor while fishing or surveying
  • A TV screen for tourism, education, or public viewing
  • A computer feed for recording, research logging, or streaming
  • A chartplotter display for real time underwater situational awareness, on systems like Simrad, Garmin, and Lowrance

The Explorer+ Adventure Kit is built specifically for those use cases. Instead of trying to push WiFi through water, it uses a DisplayPort video output from the camera and converts it to HDMI inside the housing, then runs that signal through a long range HDMI media cable.

Why the Explorer+ Adventure Kit is groundbreaking

Most underwater live view setups hit a wall as soon as the camera goes underwater, because wireless signals drop out fast. The Explorer+ Adventure Kit changes the game by delivering:

  • Stable live viewing to a screen
  • Long cable runs that suit real boat and shore setups
  • A sealed 50m housing that protects the camera completely
  • High clarity output at 1080p60 and 4K60
  • A system designed for marine handling, not delicate indoor use

If your goal is a genuine underwater camera HDMI solution, this is the kind of system people have been waiting for.

Compatible cameras

The Seavu Explorer+ Adventure Kit is compatible with:

Front-facing image of the DJI Osmo Action 5 Pro, one of the best underwater cameras for Seavu kits and livestreaming.

These cameras are a great match for underwater live viewing because they deliver strong underwater image quality, and they support USB C DisplayPort Alt Mode, which is required for this HDMI workflow.

Explorer+ Adventure Kit is a DisplayPort system, with HDMI output

This is an important point, especially for customers comparing it with the Explorer+ Pro Kit.

The Explorer+ Adventure Kit is a DisplayPort system. The camera outputs video via USB C DisplayPort Alt Mode. Inside the housing, an integrated adapter converts that DisplayPort signal into HDMI.

The key difference is that the USB C to HDMI DisplayPort adapter is integrated inside the housing.
Because the conversion happens inside the sealed housing, Seavu can then run longer HDMI cable lengths reliably using a fibre optic HDMI Media Cable.

This is a big reason the Explorer+ Adventure Kit is so effective for real world underwater camera HDMI setups at 25m and 50m.

If you want to compare the Pro option as well:
Explorer+ Pro Kit: https://seavu.com/product/explorer-plus-pro-kit/

Explorer+ housing overview (50m sealed system)

The heart of the kit is the Explorer+ housing, designed to keep the camera protected while delivering reliable live video to the surface.

Key housing highlights:

Seavu Explorer underwater camera housing streaming live footage to phone

  • Waterproof rating: 50m
  • Material: marine grade polycarbonate with 316 stainless steel bolts
  • Mounting: Seavu Explorer Clip System
  • Size: approx 180 × 150 × 130mm
  • Weight: about 240g without camera

Because the camera sits inside the housing, you are not exposing camera doors, seals, or ports to repeated saltwater wear. That is a big reliability win for long term use.

The HDMI media cable system (25m or 50m)

This kit uses a purpose built HDMI 2.1 armoured active hybrid fibre optic Media Cable designed for underwater use.

Cable highlights:

  • Lengths: 25m or 50m
  • Diameter: 5mm
  • Break strength: 100kg
  • Power delivery: none

Reel options:

  • 25m: hand reel
  • 50m: cable reel with handle and brake

This is what makes the system feel professional. You can deploy and retrieve cleanly, keep tension under control, and run stable video back to your viewing device.

Where you can view live video (HDMI outputs)

With the Explorer+ Adventure Kit you can view live underwater video on:

  • TVs and monitors
  • HDMI chartplotters, including many models from Simrad, Garmin, and Lowrance
  • Computers using an HDMI capture card
  • Production gear such as switchers or HDMI to SDI converters

Chartplotter note: chartplotter video inputs vary by model. If your chartplotter does not have HDMI, you may need an optional RCA adapter depending on the brand and connection type.

Camera control and recording, what to expect

This is important to explain clearly in the article, because it sets expectations.

Camera control

  • Once the housing is sealed, you set up your camera before deployment
  • This kit is designed for stable viewing and capture, not in housing camera control

Recording options

  • Record to the camera microSD
  • Record on a computer using an HDMI capture card if you want long sessions, logging, or easy file workflows

What is included in the Explorer+ Adventure Kit

The kit is designed to be ready to use out of the box, with the accessories needed to create a stable underwater view.

Included:

  • Explorer+ housing with integrated adapter and fixed 25m or 50m HDMI fibre optic Media Cable
  • DJI magnetic mount
  • Drift Fin
  • Troll Fin
  • Explorer weight 800g, clip on and stackable
  • Release clips, small and large
  • Seavu buoy
  • Pole mount
  • Ball mount
  • Cable loop fastener
  • Carry case
  • Reel, hand reel for 25m or cable reel with handle and brake for 50m

Optional extras you can mention if relevant:

  • 4K HDMI capture card
  • HDMI splitter
  • Fibre optic extension
  • Additional weight
  • Seafloor stand
  • Burley pot
  • Explorer video lights

Best use cases for an underwater camera HDMI system

Here are the most common reasons customers look for an underwater camera HDMI solution:

  • Fishing: live view while drifting, trolling, or at anchor
  • Tourism and education: run live underwater video to a TV
  • Research: live monitoring and recording to a computer
  • Inspections: check hulls, pontoons, moorings, infrastructure
  • Filmmaking: stable, dependable live viewing to a monitor

Which Seavu kit should you choose

Final thoughts

If you are searching for underwater camera HDMI, you are not looking for another action camera. You are looking for a complete underwater live viewing system that can run a stable video feed to a screen where you can actually use it.

The Seavu Explorer+ Adventure Kit, released 8 December 2025, is a groundbreaking step forward because it makes long range underwater HDMI live viewing practical, reliable, and repeatable, with a purpose built housing, an integrated DisplayPort to HDMI adapter inside the housing, and a fibre optic HDMI media cable system designed for real marine conditions.

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