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Volume

The On-Off Power/Volume knob also controls the speaker
Volume. The Volume adjustment applies only to what you
hear from the speaker and does not affect the Volume of
your outgoing messages, which is controlled by the 
circuitry of your radio.

To Increase The Volume:

1. Turn the On-Off Power/Volume knob clockwise.

To Decrease The Volume:

1. Turn the On-Off Power/Volume knob counter-clockwise.

Squelch

Squelch control filters weak signals and radio 
frequency noise so that you can more clearly hear 
the signals you want.

To Squelch Your Radio:

1. With the Squelch knob turned fully counter-clockwise,

turn the On-Off Power/Volume knob clockwise until you
hear a hissing (noise) sound.

2. Turn the Squelch knob clockwise until the hissing 

sound stops. Turning the Squelch knob further clockwise
will filter weak and medium strength signals until only the
strongest signal can get through at its highest setting.

To receive weaker signals, turn the Squelch knob 
counter-clockwise.

If the squelch is set so you can hear a continuous hissing
sound, the scan and tri-watch functions will be blocked.

31

Nothing 

comes close to a Cobra

®

30 English

Getting Started

Getting Started

Getting Started

Refer to the foldout on the front cover of this manual to identify the various 
controls and indicators on your radio.

Throughout this manual you will be instructed to press or to press and hold buttons 
on the radio. Press means a momentary press, then release; press and hold means 
to hold the button down.

Whenever you press any button except the 

Talk button on your radio, a brief tone

(beep) will sound to confirm the button press. With all button presses, the appropriate
icon will appear on the LCD and the backlight will turn On. The backlight will stay 
On for five (5) seconds after the button is released.

At times you will hear two (2) other sounds. Two (2) beeps will sound to confirm
your setting changes and three (3) beeps will sound to notify you of an error.

Power On-Off

The On-Off Power/Volume knob on the top of the radio is held in the Off position 
by a click stop.

To Turn Your Radio On:

1. Turn the Squelch knob half-way counter-clockwise

(when viewed from above).

2. Turn the On-Off Power/Volume knob clockwise 

until you hear and feel a click.

When the radio is powered 

On, a brief tone will sound, 

the display backlight will turn On, and the display will 
show all icons for two (2) seconds. All buttons will be
inoperative during these two (2) seconds.

After two (2) seconds, the radio will return to the settings 
in effect when it was last powered Off, the LCD will show 
the appropriate icons, and all controls will be operative. 
The radio will then be in Standby mode.

To Turn Your Radio Off:

1. Turn the On-Off Power/Volume knob all the way 

counter-clockwise until you hear and feel a click.

Operating Your  Radio

Operating Your  Radio

On-Off Power/Volume Knob

On-Off Power/Volume Knob

Squelch Knob

On-Off Power/Volume Knob

Squelch Knob

 

Summary of Contents for MRHH400

Page 1: ...annel you can select for your area Customer Assistance Should you encounter any problems with this product or not understand its many features please refer to this owner s manual If you require furthe...

Page 2: ...Lets you monitor three 3 channels at once Channel 16 and two 2 user programmable channels Six 6 AA Rechargeable NiMH Batteries Included Provides extended operating time compared to alkaline batteries...

Page 3: ...oice Calling 8 Radiotelephone Calls 9 Emergency Messages And Distress Procedure 10 VHF Marine Channel Assignments 14 NOAA Weather Channels And Alert 24 Installation Included In This Package 25 Antenna...

Page 4: ...rnings may cause you to exceed FCC RF exposure limits or create other dangerous conditions Important Safety Information Before assembling and using your CobraMarine VHF radio please read these general...

Page 5: ...ndorse cellular telephones as substitutes for marine radios They generally cannot communicate with rescue vessels and if you make a distress call on a cellular telephone only the party you call will b...

Page 6: ...ure with parts other than those recommended by Cobra may cause a violation of the technical regulations of part 80 of the FCC Rules or violation of type acceptance requirements of part 2 of the rules...

Page 7: ...tions are completed each vessel must sign off with its call sign or vessel name and switch to Channel 16 NOTE For best sound quality at the station you are calling hold the microphone on the front of...

Page 8: ...arina to bring the fuel you need or give you a tow Marine Emergency Signals The three 3 spoken international emergency signals are The distress signal MAYDAY is used to indicate that a station is thre...

Page 9: ...ite out a script of the message form and post it where you and others on your vessel can see it when an emergency message needs to be sent VHF Marine Radio Protocols VHF Marine Radio Protocols Marine...

Page 10: ...s only Messages must be about business or needs of the ship Use Channels 8 67 72 and 88A only for ship to ship messages Public Correspondence Marine Operator Channels 24 25 26 27 28 84 84A 85 85A 86 8...

Page 11: ...ommercial VTS in selected areas 02 Public Correspondence Marine Operator 03 Public Correspondence Marine Operator 03A Government Only 04 Public Correspondence Marine Operator Port Operations Ship Move...

Page 12: ...e Operator 27 Public Correspondence Marine Operator 28 Public Correspondence Marine Operator 60 Public Correspondence Marine Operator 61 Public Correspondence Marine Operator Port Operation Ship Movem...

Page 13: ...U S Government Only Canada Commercial Fishing 65 Public Correspondence Marine Operator Port Operations Ship Movement 65A Port Operations 66 Public Correspondence Marine Operator Port Operations Ship M...

Page 14: ...8 Public Correspondence Marine Operator 78A Non Commercial Recreational 79 Port Operations Ship Movement 79A Commercial Also Non Commercial only in Great Lakes 80 Port Operations Ship Movement 80A Com...

Page 15: ...n When the Weather Alert mode on your radio is On this signal will produce a loud tone from the speaker in the radio and a flashing ALRT icon on the LCD to signal that a weather alert is being broadca...

Page 16: ...al Hydride Batteries in the package When your rechargeable Batteries begin to discharge too quickly it is time to install new ones It will also operate with six 6 high quality alkaline Batteries Insta...

Page 17: ...ou attach it to a shelf or bulkhead using the screw holes provided to prevent damage due to the boat rolling or pitching Installation Installation Maintaining The Battery Charge As you use your radio...

Page 18: ...s or to press and hold buttons on the radio Press means a momentary press then release press and hold means to hold the button down Whenever you press any button except the Talk button on your radio a...

Page 19: ...d the Low Power icon will appear on the LCD If the radio is in the Key Lock mode the channel will not change and the three 3 beep error signal will sound Transmit Power Output Your radio can Transmit...

Page 20: ...ve any messages sent on the channel to which you are tuned Transmit Transmit mode gives you the ability to interact with safety services other vessels and shore stations When you use this capability b...

Page 21: ...rt mode On or Off The Alert icon on the LCD will turn On or Off To exit the Weather mode and return to Standby mode press the Weather UIC button again Weather Alert Signal When NOAA broadcasts a Weath...

Page 22: ...or further details To Enter Tri Watch Mode 1 From Standby mode press the Tri Watch button The Tri Watch icon will appear on the LCD and the radio will scan among Channel 16 tri watch location one 1 an...

Page 23: ...tion Mode 1 Press the Memory button to return the radio to Standby mode on the last channel shown on the LCD before entering Memory Location mode Channel Scan During Channel Scan the radio will rapidl...

Page 24: ...n the LCD To Exit Memory Location Scan 1 From Memory Location Scan mode press the Scan button This will return the radio to Memory mode on the last scanned memory location 2 Press the Memory button to...

Page 25: ...by 8 Hours 5 Watts 10 hours 1 Watt Current Drain Stand by 40 mA Receive 200 mA Transmit 1 8 A High power 0 7 A Low Temperature Range 20 C to 60 C Radio Dimensions 5 5 x 2 2 x 1 4 14 cm x 5 6 cm x 3 6...

Page 26: ...ranty For Products Purchased In The U S A Cobra Electronics Corporation warrants that its CobraMarine VHF radio and the component parts thereof will be free of defects in workmanship and materials for...

Page 27: ...CB Radios microTALK Radios Radar Laser Detectors Safety Alert Traffic Warning Systems Accessories GPS Global Positioning System HighGear Accessories VHF Marine Radios Power Inverters Order Form Name...

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