ENOS Receiver


The electronic receiver with screen, ENOS on board the dive boat. To ensure the safety of underwater divers, autonomously. Quick and efficient localization. Rapid acquisition of the distressed diver's position. ENOS, the ultimate diver rescue system.

The ultimate diver rescue system
ENOS, the divers' best friend


Despite all precautions, strong currents can still surprise divers and sweep them away into the ocean. An extremely dangerous situation!

This often results in large-scale search operations that do not always end successfully, as drifting divers are just "tiny drops in the ocean".


The ENOS electronic location and rescue system provides crucial assistance: it is the world's first satellite-based GPS rescue system dedicated to divers, supporting the search for missing divers on the surface. ENOS is reliable and high-performing worldwide.

Electronic Rescue and Location System

The ENOS system consists of 2 units supported by GPS:

  • The ENOS receiver on board the dive boat
  • The ENOS beacons that divers are equipped with during the dive

The ENOS ERX Receiver

Depending on the dive center's needs, the ENOS receiver is available in several versions:

  • Control screen permanently installed at the command post with a remote antenna, fixed installation (ERX-P / ERX-S).
  • Mobile device in a watertight Pelican case for easy transport. This option is particularly suitable for rigid-hulled inflatable boats (ERX-BT-I/ERX-BT-O/ERX-I/O-ERX).

The ENOS ETX Beacon

Easy to handle, even in stressful situations: simply turn the switch to activate the beacon. Learn more about the beacon

ENOS System Operation Principle

  1. The ENOS receiver is placed on the dive boat. Its GPS position [A] is determined through GPS satellites.
  2. Once on the surface, divers activate their ENOS beacons, which transmit a first alert to the ENOS receiver on the boat. The crew is immediately informed of the emergency situation. Then, the ENOS beacon automatically determines its GPS position [B].
  3. As soon as the ENOS beacon has evaluated its GPS position [B], it automatically transmits the data to the ENOS receiver through an independent radio frequency (UHF).

Using its own GPS position [A] and the received GPS position [B] from the beacon, the ENOS receiver then determines the exact distance and direction between the boat and the distressed diver.

These data are clearly and simply displayed on the ENOS receiver's screen.

For Quick and Reliable Rescue, Choose ENOS!

Location, ENOS on the Screen

Once activated, the ENOS beacon transmits a first alert to the boat, quickly informing the crew about the distressed divers:

  • A high-frequency alarm is audible
  • A red window appears on the screen

This alarm message box remains active until the crew confirms its reception.

When the ENOS receiver receives GPS data from the ENOS beacon, it displays them on the screen with a simple graphical representation:

The cross in the center of the circle represents the boat's position.

The arrow at the top of the circle indicates the boat's heading.

Numbers 1 and 2 within the circle show the divers' positions relative to the boat.

The radius of the circle automatically adjusts based on the farthest emergency signal.

On the right side of the graphical representation (circle), essential data necessary for the rescue operation are displayed:

      • The number of distress calls received (Count)
      • The elapsed time since the first call (Time)
      • The distance
      • The divers' positions
      • The date, local time, position data, boat speed, and heading are displayed in the upper right corner of the screen
      • The battery symbol indicates the battery charge status
      • The broken green bars indicate the number of received GPS satellite signals, with one bar per satellite

Depending on the ambient lighting conditions, the screen's contrast colors can be adjusted according to user preferences. Depending on the local lighting conditions, the screen colors can be individually adjusted: Blue/White, Black/White, White/Black.

ENOS: A Unique Rescue System in the World, Finding the Tiny Drop in the Ocean

No more searching for missing divers! Thanks to the precise data displayed on the ENOS receiver's screen, the crew always knows the location of the drifting divers.

Each ENOS receiver receives all alerts from all ENOS beacons within their reception range, even if they belong to divers from other boats.

Each beacon can be customized.

"External" alerts are also presented with all necessary data for a quick rescue, but without the diver's name = without personalization.

In the figure above, Diver #2 belongs to another boat.

ENOS is the only dedicated diver rescue system worldwide that can receive, evaluate, and display multiple alerts simultaneously.

ENOS: The Key to Quick Rescue

Even in stressful situations, the ENOS receiver's screen clearly shows the drifting diver's position in a highly understandable manner.

For a swift rescue operation!

The graph can be displayed in two versions:

1. Relative Diagram

The distance and heading between the boat and the diver are displayed on the screen (Figure 1).

2. GPS Position

The screen displays the precise GPS coordinates of the distressed diver (Figure 2).

If multiple divers are in distress and activate their ENOS beacons, the ENOS receiver is capable of evaluating and displaying all received alerts simultaneously.

The ENOS receiver: Extraordinary performance

The graphical display on the ENOS receiver's screen is easy to understand. The display conversion and the intuitive and user-friendly menu of the ENOS receiver are programmed in English and German.

This ensures optimal presentation of all rescue data and perfect graphical display.

The ENOS receiver receives, evaluates, and displays multiple alerts simultaneously detected within its reception range.

Exceptional Power Management

The rechargeable batteries of the ENOS receiver last for approximately 120 hours.

The factors contributing to the success of the ENOS system:

      • Immediate alert, immediate rescue
      • Easy to handle and understand
      • Comprehensive information about the distressed person + precise distance data
      • Precise GPS coordinates upon request
      • Evaluation of multiple alerts simultaneously
      • Independent of external rescue institutions
      • Free and license-free, no SRC required
      • Reception range extends up to 5.6 NM/10 km
      • Emergency calls updated every 20 seconds
      • 120 hours of current runtime for the mobile ENOS receiver

Where is Mike?

"There he is: 401 meters away, in sector 43° - no doubt!"

Make your choice:

Multiple models of ENOS receivers offer tailored solutions for individual needs!

ENOS Receiver - Mobile Applications

The ENOS receiver is available in several different versions. This range of tailored solutions is specifically designed to meet the individual needs of the dive center.

      • Is the dive boat frequently changed?
      • Is there no bridge on the dive boat?
      • Does ENOS need to be used on a tender?

In such cases, the portable ENOS receiver is the ideal solution.

It is available with a built-in touchscreen display, model ERX-O, or with a tablet as a mobile screen, model ERX-BT-O.

All portable ENOS receivers are fully equipped with internal GPS and reception antennas. The receivers are self-sufficient, economically independent, and can be used anywhere without additional technical support.

The integrated GPS antenna requires an external application to determine the ENOS receiver's GPS position. External positioning on the deck or bridge is recommended.

For indoor use, the ENOS receiver is available with an additional socket to connect an external GPS antenna mounted outside. With this version, the ENOS receiver can determine its GPS position even inside a cabin: models ERX-BT-I and ERX-I.

1. Mobile Case with Built-in Touchscreen Display - ERX-I/O ERX-

+ Perfect when different boats are frequently used

+ Ideal for very small boats, even suitable for inflatable versions

+ Long-lasting rechargeable batteries: up to 20 hours!

Available for outdoor use only, model ERX-O, or with an additional socket for an external GPS antenna, model ERX-I.

2. Mobile Case with 7" Tablet-Screen - ERX-BT-O/ -I

+ Perfect for small boats or when different boats are frequently used

+ Ideal for mobile applications, even suitable for inflatable versions

+ Impressive long-lasting rechargeable batteries: up to 120 hours!

The mobile case receives and evaluates divers' distress calls and transmits them via Bluetooth to the tablet. Monitoring divers with just a handheld tablet becomes easy. During transportation, the tablet is stored inside the mobile ENOS receiver for maximum protection against damage. Available for outdoor use only, model ERX-BT-O.

Alternatively, it is available with an additional socket for indoor use to connect to an EXTERNAL radio reception and GPS antenna, model ERX-BT-I.

ENOS Receiver: Permanent Installations

In the case of consistent use on the same boat, the ENOS receiver can be permanently installed on board the dive boat. Here, too, multiple options are available for customized solutions, specifically designed for each requirement.

Permanently installed receivers offer the advantage of having the radio and GPS reception antennas mounted as high as possible on the boat.

This ensures the performance of the ENOS system and expands the reception range. The higher the radio reception antenna is on board, the wider the ENOS system's reception zone.

3. Fixed Mount Receiver on the Deck - ERX-P

      • Ideal for cruises and
      • Boats that are consistently used
      • The ENOS receiver with a touchscreen display complements onboard navigation

The ENOS receiver's screen is always visible to the skipper. Any incoming alerts are instantly recognized.

During the rescue operation, the ENOS receiver greatly assists the skipper, who can monitor the positions and distances of the distressed divers on the screen.

ENOS Guides the Skipper to the Divers.

4. Fixed Mount Receiver with 7" Tablet - ERX-S

      • Ideal for cruises and boats that are consistently used
      • Great onboard mobility due to the ENOS screen used as a tablet
      • Perfect for control stations and narrow cockpits

The perfect combination of permanent installation and mobility:

The ENOS station is permanently installed on the boat and receives alerts. Its GPS and radio reception antennas are positioned as high as possible on board to optimize the ENOS system's performance.

The ENOS station evaluates the received alerts and transmits the data to the tablet PC via Bluetooth technology.

The tablet enhances the crew's agility on board: with just a handheld tablet, it becomes easy to monitor missing divers. During the rescue operation, the skipper places the tablet on their control station and navigates the boat according to the information on the ENOS screen.

ENOS Guides the Skipper to the Divers.

The ENOS Beacon: High-Tech Rescue Beacon, Reliable and Unique in the World

Don't worry about maintenance, focus on your dives!


Available accessories provide various application options based on the dive center's individual needs.

Tailor-made solutions specifically designed for on-board requirements and the dive center's individual needs!

1. Battery Charger for Mobile ENOS Receiver

It is included in the initial delivery and can be ordered separately.

It can also be used as a power adapter: The battery charger can be connected to the socket for permanent power supply; 110-240 Volt.

The tablet's delivery includes an additional separate battery charger (not shown on these pages).

2. External Radio Antenna

The external radio antenna is necessary for the permanently installed ENOS receiver and is mounted on the deck with a base or vertically fixed with a mounting bracket. The antenna is connected to the ENOS receiver via a cable.

Alternatively, it can be combined with the mobile ENOS receiver to enhance its transmission range (ERX-BT-I and ERX-I).

The external radio antenna is permanently installed on board and quickly connected to the ENOS receiver through the cable.

3. External GPS Antenna with Cable

The external GPS antenna with cable and base is fixed on board and connected to the permanently installed ENOS receiver on the skipper's bridge. Additionally, it can be connected to the GPS antenna input of the mobile ENOS receiver ERX-BT-I and ERX-I for indoor use.

4. ENOS Beacon Case

The ENOS beacon case provides a convenient and secure attachment for the diving equipment.

5. ENOS Beacon Battery Kit

The battery kit includes an O-ring and Allen key for opening the casing.

The ENOS beacon is powered by 2 AAA-sized batteries, which are widely available worldwide. The batteries are factory-made and come with lithium batteries.

Battery replacement can be easily done by the customer. No need to send it back to the factory for battery replacement!

One System, Two Units - Multiple Possibilities!

Technical Data

ENOS Receiver, ERX-BT Mobile, Bluetooth + Tablet

ERX-BT-I: Usable inside the cabin (indoor) and outside (outdoor). ERX-BT-O: For outdoor use only.

ENOS Receiver, ERX Mobile, Touchscreen Display

ERX-I: Usable inside the cabin (indoor) and outside (outdoor). ERX-O: For outdoor use only.

ENOS Receiver, ERX-P Fixed Mount on the Bridge

ERX-P: Receiver and display are mounted on the deck and always within visible control of the skipper.

ENOS Receiver, ERX-S Fixed Mount with 7" Tablet

ERX-S: Permanently installed reception station on board, requires a tablet as the display.

ENOS Beacon, ETX with Case

ETX: Worn by the diver during the dive. No impact on buoyancy or diver's movement.

Pelican-type housing/case

270 x 250 x 120 mm (L x W x H), made of plastic


Data sheet

Feature Specification
Type of use Nautical activities and water and underwater activities.
Warranty 2 years