UM423AM - Marine VHF Radio UNIDEN - Free user manual and instructions

Brand	Uniden
Model	UM423AM
Product Type	27MHz AM Marine Radio
Dimensions (H x W x D)	65mm x 162mm x 126mm
Weight (with microphone)	900g
Power Supply	12V DC (typical marine battery)
Output Power	4 Watts maximum
Number of Channels	10 AM Marine Channels (Inshore Boating Radio Service)
Water Resistance Rating (Radio Housing)	JIS6 - withstands powerful water jets
Water Resistance Rating (Microphone)	JIS7 - submersible to 1m for 30 minutes
Speakers	Dual: one front unit, one in microphone handpiece
Display	Extra Large LCD with backlight and 3-level dimmer
Key Features	Variable squelch, volume control, RF level bar, PA output, siren alert, ANL, NB, one-touch Ch88, open scan, group scan with priority, dual watch, roger beep, call tone
Accessory Input	For external speaker and PA speaker
Warranty	2 years
Country of Design & Engineering	Japan
Regulatory Compliance	Designed for Australian and New Zealand waters (illegal to operate elsewhere)

Frequently Asked Questions - UM423AM UNIDEN

What is the difference between JIS6 and JIS7 water resistance for this radio?

The radio housing meets JIS6, meaning it can withstand powerful water jets. The microphone meets JIS7, meaning it can be submerged in 1 meter of water for up to 30 minutes without damage.

How many channels does the UM423AM have?

It has 10 AM marine channels covering the Inshore Boating Radio Service (IBRS) for harbour, bay, and river communications.

Can I use this radio outside of Australia or New Zealand?

No, it is illegal to operate this radio transceiver outside of Australia and New Zealand due to frequency allocation regulations.

Does the radio come with a warranty?

Yes, the Uniden UM423AM comes with a 2-year warranty.

How do I install the UM423AM on my boat?

The radio requires a 12V DC power connection and a suitable antenna (not included). Mount the radio using the bracket provided. Ensure the microphone is accessible. Refer to the user manual for detailed installation instructions.

Does the UM423AM have a scanning function?

Yes, it supports Open Scan (scans all channels) and Group Scan with priority channel watch, allowing you to monitor selected channels.

What is the dual watch function?

Dual Watch lets you monitor Channel 88 (emergency channel) every two seconds while listening to another selected channel.

How do I use the PA/siren function?

Connect an optional PA speaker to the accessory input. Then use the PA or siren alert function from the radio to broadcast over the speaker.

What is the RF level bar indicator?

The RF level bar displays the received signal strength, helping you assess transmission quality from other vessels.

Is the microphone backlit?

The microphone has non-slip rubberised material and includes channel select, one-touch Ch88, and dual watch keys, but the microphone itself is not backlit. Only the main unit keypad and LCD are backlit.

USER MANUAL UM423AM UNIDEN

Uniden Australia Pty Ltd

73 Alfred Road

Chipping Norton 2170 NSW

Tel: [phone] | Fax: [phone]

www.uniden.com.au

Digital water heater with digital display and coiled cord, no visible text or symbols

UM423AM

PRINT this page

EMAIL a friend

27MHz AM Marine Radio

Range Brochure PDF

Operating Manual PDF

Like 78K

The watertight UM423AM

Marine radio is ideal for all harbour, bay and river communications. Equipped with dual speakers for better sound clarity, the UM423AM has one speaker at the front of the unit and a second speaker built into the microphone handpiece.

The radio housing is fully watertight and certified to meet the worldwide JIS6 water-resistance specification*. It has a rugged waterproof and submersible speaker microphone, meeting the world JIS7 specification^ and includes Channel Select, One-Touch Ch88 and Dual Watch Select Keys.

27MHz AM MARINE RADIO

BUILT FOR RUGGED AUSTRALIAN MARINE CONDITIONS

WATERPROOF SPEAKER MICROPHONE

WATERTIGHT RADIO HOUSING

2 YEAR WARRANTY

CLICK HERE FOR

UHF Range Overview

Alert nearby vessels using the Siren Alert feature with connection of an optional PA speaker.

The UM423AM has 4 Watts Maximum Output Power and 10 AM Marine Channels, allowing you to choose from all the Inshore Boating Radio Service channels to transmit or receive messages. The Extra Large LCD Display and Keypad is backlit for easy viewing at night or in low light situations. The microphone and controls are made out of non slip rubberised material making it comfortable and secure to handle.

Designed in Japan specifically for rugged Australian conditions, Uniden's UM423AM radio offers outstanding performance for all those who enjoy being on the water.

Suggested Retail: \$189.95

Key Features

Designed and Engineered in Japan

Built for Rugged Australian Marine Conditions

2 Year Warranty

Dual Speakers: One speaker is mounted at the front of the unit allowing better sound clarity and the second speaker is built into the microphone hand piece.

4 Watts Maximum TX Output Power

10 AM Marine Channels: Allows you to choose from all the Inshore Boating Radio Services channels to transmit or receive messages.

Watertight Radio Housing*: Meets the worldwide JIS6 water-resistance specification, which means the radio is able to withstand powerful water jets without damage

Rugged Waterproof and Submersible Speaker Microphone^: With Channel Select, One-Touch Ch88 and Dual Watch Select Keys. Meets the worldwide JIS7 waterproof specification; submersible to 1.0 metre depth for 30 minutes

Variable Squelch Level Knob: Adjust the threshold of the receiver to eliminate background noise whenever a transmission is not being received

Volume Control Knob: Rotary Power on/off and volume control

Backlit Keypad and LCD Display: The keypad and Extra Large Liquid Crystal Display (LCD) is backlit for easy viewing at night or in low light situations, and features a 3 level dimmer function

RF Level Bar Indicator: View the radio frequency signal strength.

Built-in PA Output: Connect optional PA speaker for Public Address and Siren Function.

Siren Alert Function: Alert nearby vessels with connection of an optional PA speaker

ANL (Auto Noise Limiter) Function: Reduces unwanted signal noise for better clarity.

NB (Noise Blanker) Function: Reduces unwanted power or ignition noise

One Touch Channel 88 Recalling: Instantly switch to the emergency Ch 88 with the touch of one button on the radio or the microphone

Open Scan: Scans all the channels in memory and locks on active channels

Group Scan (GS) with Priority Channel Watch: Allows the user to select the channel they want to monitor / listen to in a group, along with a priority channel (priority watch)

Dual Watch Function: Allows you to monitor Ch 88 for activity every two seconds while monitoring another channel at the same time.

Roger Beep: Confirmation tone indicates the completion of your transmission

Call Tone Function: Choose from one of 5 ringing tones to initiate your transmission with the touch of one button

Accessory Input: For connecting optional External Speaker and PA Speaker

And More!

Additional Features:

Size: 65mm (H) x 162mm (W) x 126mm (L)

Weight: 900g (With MIC)

* Watertight Radio Housing: Meets the world standard JIS6, being defined as able to withstand powerful water jets without damage

^ Waterproof Speaker Microphone: Meets the world standard JIS7, being defined as having no ingress of water when immersed to 1 metre for 30 minutes.

# Please note It is illegal to operate this radio transceiver outside of Australia and New Zealand

TOP ↑