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METAL

If there is any doubt as to the products’ serviceability, immediately contact 
your authorised dealer or service centre for advice.

NOTE:

 Some installations may be covered by state, national or international 

carriage requirements. Such legislation may impose additional inspection and 
maintenance requirements beyond those listed above. Contact the relevant 
authority for further information.

SAFETY SEAL

The safety seal which covers the tab behind the ‘

ON’

 slider is designed to tear 

if the unit is switched on. A safety seal that is not broken serves to indicate 
that the beacon has never been manually activated.

NEVER remove or break the seal unless deploying the EPIRB in an emergency.

If the beacon has been activated for any length of time, the batteries can no 
longer be guaranteed to have the capacity to operate for the minimum 48 
hour period and therefore must be replaced.

TESTING THE EPIRB

It is recommended that you test the MT400/401 at regular intervals 
(approximately monthly) to ensure it is fully functional. You should also test 
the EPIRB prior to an extended journey.

DO NOT over test – testing consumes some battery power.

WARNING:

 

(MT401 only) DO 

NOT

 remove the MT401 from its‘ mounting bracket 

if the unit is wet, it may automatically activate. Ensure the unit is thoroughly dry 
before removal.

You may test the EPIRB at any time using the following procedure:

1.

    Remove the beacon from the bracket. Keep the antenna well clear of 

metalic objects during testing.

2.

   Lift the cover marked 

‘LIFT’

.

3.

   Briefly press then release the 

yellow 

‘TEST’

 button.

4.

   The Strobe light will flash once and 

the unit will give two quick beeps 
to show that it is functioning.

5.

   Close the switch cover and press 

firmly into place until it clicks.

6.

  Return the beacon into the bracket.

If the EPIRB fails the testing process you should return it to your Dealer or 
nearest GME branch office for maintenance.

UNACCOMPANIED TRANSPORTATION

Your MT400/401 EPIRB contains Lithium batteries. Some transportation or 
courier companies may have special requirements for transporting devices 
containing Lithium Batteries. 

If returning your MT401 to your dealer or GME branch office for repair 

or scheduled battery replacement, you should inform the transportation 
company beforehand that your beacon contains Lithium batteries. 

DO NOT send your beacon through the postal system.

DISPOSAL

Special precautions must be taken when finally disposing of your beacon 
at the end of it’s useful life. Legislation may determine the specific 
requirements which apply to you. In the first instance contact your National 
Authority for advice.
The following information may also be helpful:
•   To permanently disable the beacon remove the 4 screws retaining the 

cover, open unit, unplug battery lead, then reseal.

•   Lithium batteries are generally not considered as hazardous waste when 

fully discharged. Qualified personnel may be able to slowly and safely 
discharge the cells for you.

DO NOT short circuit the cells or battery. DO NOT incinerate.

SPECIFICATIONS - MT400 AND MT401

MODES OF OPERATION

 

Activated:

    UHF (406) and VHF (homer) complete with high intensity 

strobe and audible activation alert.

 

Self test:

    Comprehensive internal diagnostics with visual and 

audible operator feedback. UHF test message (inverted 
synchronisation compatible with portable beacon testers).

OPERATION
 

Activation:

   MT400/401 - Manually by operator 

 

  MT401 - Automatic when deployed in water.

 

Bracket Type: 

Manual Release.

 

Duration:

   48 hours minimum.

 

Transmission Delay:

   121.5 and 406 MHz distress signals commence ~  

60 seconds after activation.

 

Warm Up:

    None required (due to digital frequency generation).

 

VHF:

   121.5 MHz, 50 mW ±3 dB, swept tone AM. 

 

UHF:

   406.028 MHz*, 5 W ± 2 dB, PSK (digital). 

 

Strobe:

   20 flashes/minute at greater than 0.75 cd  

 

  effective intensity.

 

COSPAS-SARSAT

  Certified to C/S T.001 (Class 2) requirements.

 

UHF-Protocol/Data:

  Serial User*.

  Repetition Period:

   50 s mean, digitally generated randomization.

 

VHF:

  Satellite compatible phase coherent.

BATTERY

 Replacement Period:

  Prior to expiry date marked on case.

 Replacement Method:

   Service centre, or factory only (non-user replaceable).

5. 

  Educate others on board your vessel regarding the consequences of activation.

NOTE:

 (MT401 only): This model should always be stowed in its bracket to 

minimise the possibility of an accidental automatic activation in the presence 
of moisture. The yellow collar, provided only with this model‘s bracket, contains 
special features which temporarily inhibit automatic water activation of the 
EPIRB. If transporting the MT401 out of it’s mounting bracket, ensure that it 
remains completely dry at all times.

INSTALLATION

The MT400/401 can be mounted upright or horizontally against a panel or 
bulkhead. When selecting a location, 
consider the following:
•   Select a location that is readily 

accessible in an emergency.

•   Ensure the unit is protected against 

the environment. Avoid locations 
where it will be subject to water 
spray or continuous sunlight.

•   Mount the unit in a location 

where it will be safe from physical 
damage.

•   The specifications section contains 

the ’Compass Safe Distance’ for 
your particular model EPIRB. This is the minimum distance that must 
be maintained between an inactive stowed beacon and any magnetic 
navigational device.

•   Confirm the selected location allows sufficient clearance to remove the 

beacon from the bracket when required.

Hold the mounting bracket in place (with the EPIRB removed) and mark the 
location of the mounting holes. Screw the bracket to the panel or bulkhead 
using the stainless steel screws supplied.

NOTE:

 

The placement of the mounting holes for the mounting bracket are 

identical to those used on the earlier MT300 EPIRB. 

Once the bracket is fixed in place, fit the MT400/401 to the bracket.

IN AN EMERGENCY

If an emergency occurs, you should first try to use your radio to summon 
assistance.

Distress procedures should only be used where grave and imminent danger 
threatens your craft and assistance is required. If contact is made, it may 
not be necessary to use the beacon. Notify the ‘Emergency Facility’ that you 
have a beacon and that you will turn it on upon their instructions.

Use the Beacon as a Last Resort.

If dire emergency threatens life and you have been unable to make radio 
contact or have lost radio contact, use the beacon. The distress signal 

transmitted by your beacon identifies you as a craft in distress and will initiate 
an air/sea search and rescue.

BRACKET RELEASE AND STOWAGE

To remove the EPIRB

WARNING:

 (MT401 only) DO NOT remove the MT401 from its‘ mounting bracket 

if the unit is wet, it may automatically activate. Ensure the unit is thoroughly dry 
before removal.

1. 

  With one hand, press down on the tab marked 

’RELEASE’

 at the base of 

the bracket.

2.

   Grasp the EPIRB with the other hand and pull 

it outwards and downwards.

3.

   The antenna will release automatically and 

spring to the upright position.

To re-fit the EPIRB

1.

   Insert the EPIRB, antenna first, upwards into 

the bracket.

2.

   Press the tip of the antenna against the 

bottom of the three ridges in the antenna slot 
and slide the EPIRB upwards into the frame of 
the bracket so that the antenna folds over.

3.

   Press downwards on the 

‘RELEASE’

 lever and push the EPIRB base firmly 

into the bracket until the lever clicks upwards.

MANUAL ACTIVATION (MT400 AND MT401)

1.

   Remove the beacon from the bracket.

2.

   Lift the switch cover (marked 

‘LIFT’

).

3.

   Slide the 

‘ON’

 slider switch fully forward 

in the direction of the arrows. The unit will 
initially self test, then after two seconds 
the flashing strobe and beeps will indicate 
the beacon is operating. 

4.

   Close the cover to secure the switch. 

WATER ACTIVATION (MT401 ONLY)

1.

   Remove the beacon from the bracket.

2.

   Deploy the beacon in water if sea conditions permit. The unit will initially 

self test, then shortly after the flashing strobe and beeps will indicate the 
beacon is operating. 

The MT401 has been designed to maintain continuity of operation even when 
the units sensors leave the water for periods of several seconds at a time. 
Uninterrupted operation is however always best guaranteed by also manually 
activating the EPIRB.

If the beacon is to be deployed but not in water the manual activation 
method must be used.

5.

   To cancel Water Activation (MT401 only) dry the beacon or restow the 

beacon in the bracket. It may take a number of seconds for the EPIRB  
to de-activate.

6.

   Check that both the strobe light and the 

‘beep’

 have stopped.

IN THE EVENT OF ACCIDENTAL ACTIVATION

If you suspect that an EPIRB has been activated inadvertently, you MUST turn 
it off and report it immediately to your National Authority‘s Rescue  
Co-ordination Centre to prevent an unnecessary search. 

If at sea call your local VHF coast station, or Rescue Co-ordination centre. 
In

 

international waters contact a Maritime Rescue Co-ordination Centre or 

Coast Radio Station (CRS) by any available means.
When reporting you should include the following:

1.

   Your EPIRB’s 15 character Unique Identifier Number (UIN), which is 

marked on the unit body.

2.

  Date, time and duration of activation.

3.

  Cause of activation.

4.

  Location at time of activation.

Search and Rescue authorities will not penalize an EPIRB owner or operator 
in cases of genuine accidental activation.

BATTERIES AND MAINTENANCE

The MT400/401 is fitted with the very latest in high capacity Lithium battery 
technology. These batteries are able to operate within a temperature range of 
-20°C to +55°C.

The full operational capability of your beacon may not be available if the 
batteries fitted have exceeded their replacement date, as shown on the body 
of the unit. Prior to reaching this date, make arrangements to have your 
MT400/401 returned for service.

NOTE: 

The replacement of batteries due to expiry or usage is not covered by the 

product‘s Warranty. EPIRB maintenance operations, including battery replacement, 
require that the beacon be returned to a manufacturer approved service facility.

Although the MT400/401 is otherwise maintenance free, routinely following 
these few simple steps will help ensure that your beacon will be operationally 
ready if called upon:

1.

  Test the EPIRB at the recommended interval.

2.

  Confirm the SAFETY SEAL has not been broken.

3.

   Check that the batteries have not passed their replacement date.

4.

   Inspect the MT400/401 and bracket for damage or deterioration.

5.

   Keep the unit clean by wiping over with a damp cloth (warm water and 

mild detergent are suitable), then dry.

6.

   Verify that the unit releases correctly from the bracket and is securely 

retained when returned to it.

DEPLOYING THE EPIRB

Unwind the cord and secure the EPIRB to prevent loss.

When activated, the MT400/401 will transmit the 

strongest signal

 to the satellites when:

•  It is floating in water.

•   It is well clear of surrounding and  

overhanging objects.

•  The antenna is vertical.

In extreme sea conditions, you should not float 
the EPIRB free of the vessel or the life raft if there is the possibility of loss or 
damage to the EPIRB.

By observing the following guidelines satisfactory operation should still be 
achieved when operating the EPIRB out of water.

•        The EPIRB signal 

will not pass 

through metal

 but will pass 

through fiberglass, wood or fabric 
with some loss when wet. 

•   The body of the EPIRB can be 

attached to metal fittings, but 
the antenna must be 

vertical and 

clear of the metal.

•   If the cabin is metallic (such as steel or aluminium), the EPIRB should be 

mounted on a clear space outside with the antenna vertical and clear of 
surrounding objects.

WARNING:

 Switching a beacon on and off interferes with the satellites ability 

to determine your location. Once activated in an emergency allow the beacon to 
operate without interruption until your rescue.

NOTE:

 Normal operation of your beacon will cease once battery capacity is 

depleted. Special circuitry within the MT400/401 however directs any remaining 
capacity towards extended operation of the homing transmitter. Although the 
beacon may otherwise have appeared to cease functioning it is likely that a 
homing signal is still being emitted.

TURNING THE EPIRB OFF

It is important that you turn the EPIRB off as soon as possible 

after

 being 

rescued. If you leave the EPIRB running when it is no longer needed it may 
make it difficult for the satellites to detect other beacons that may be  
transmitting in the area.

1.

   Remove beacon from the water.

2.

   Lift the switch cover (marked  ‘

LIFT

’).

3.

   Slide the yellow slider switch fully towards the 

’OFF’

 (MT400) or ‘

READY

’ 

(MT401) position.

4.

   Close the cover to secure the switch.

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