Why does the scan not start on my Icom IC-M505?
- RRyan BarrettSep 13, 2025
If the scan function on your Icom Transceiver doesn't start, it might be because a TAG channel is not programmed. To resolve this, set the desired channels as TAG channels.

Why does the scan not start on my Icom IC-M505?
If the scan function on your Icom Transceiver doesn't start, it might be because a TAG channel is not programmed. To resolve this, set the desired channels as TAG channels.
| Brand | Icom |
|---|---|
| Model | IC-M505 |
| Category | Transceiver |
| Language | English |
Lists key features like DSC, waterproof construction, and optional accessories for the IC-M505.
Emphasizes reading all instructions thoroughly and saving the manual for future operational reference.
Explains the meaning of WARNING!, CAUTION, and NOTE symbols used throughout the manual.
Details steps for distress calls via Channel 16 and Digital Selective Calling on Channel 70.
Provides guidance on RF exposure, antenna placement, and safe operating distances for installation.
Explains CE marking, warning symbols, and the manufacturer's Declaration of Conformity.
Covers electrical, environmental, and operational safety warnings for proper transceiver use.
Advises maintaining a minimum distance from magnetic compasses to prevent interference.
Outlines rules for call priorities, monitoring Channel 16, and proper use of distress signals.
Details the necessity of Ship Station and Operator's Licenses for legal transceiver operation.
Identifies and describes the function of all buttons and keys on the transceiver's front panel.
Continues the description of front panel controls like channel selector, squelch, and volume.
Explains the meaning of various indicators and readouts on the transceiver's LCD screen.
Details the functions of the PTT switch, channel keys, and power key on the attached microphone.
Explains how to select Channel 16 and the leisure-use call channel for communication.
Describes how to switch between International, USA, ATIS, and DSC channel groups.
Covers the fundamental procedures for sending and receiving radio signals, including power levels.
Instructions on programming favorite channels as call channels for quick recall within channel groups.
How to add channel comments, use microphone lock, and adjust display backlight settings.
Details on activating the scrambler and programming codes for private voice communications.
Explains Priority Scan and Normal Scan modes for efficient signal monitoring over frequency ranges.
How to set TAG channels and initiate scanning operations for channel monitoring.
Explains Dualwatch and Tri-watch for monitoring Channel 16 and call channels simultaneously.
Essential steps to program the transceiver's unique 9-digit MMSI code and how to check it.
Covers programming, naming, and deleting individual DSC address IDs for communication.
Instructions for programming and deleting group IDs and associated names for group calls.
How to manually input ship's position (latitude/longitude) and current UTC time for DSC calls.
Step-by-step guide to initiating a distress call, including simple call and regular distress types.
Procedure to send a DSC signal to a specific ship, including selection of recipients and channels.
How to send 'Able to comply' or 'Unable to comply' responses to individual and group calls.
Steps to initiate DSC calls to specific groups or all ships within communication range.
How to request another vessel's position or transmit your own vessel's position information via DSC.
General overview of how the transceiver handles and alerts the user to incoming DSC calls.
Details on receiving individual, group, all ships, geographical area, and position-related calls.
How the transceiver stores and allows access to distress and other types of received DSC messages.
Menu options for configuring DSC settings like MMSI, address IDs, offset time, and auto-acknowledgement.
How to use the optional intercom feature for communication between the cabin and deck.
Using the RX speaker to hear audio on a hailer speaker, useful for deck communication.
How to use the hailer function to amplify voice over a loudspeaker for external announcements.
Explains the automatic foghorn feature, its patterns, and usage for vessel status signals.
How to enter and navigate Set Mode, covering scan types, timers, and other configurable options.
Details on configuring Dual/Tri-watch, LCD contrast, beep tones, and foghorn frequency settings.
Configuration options for radio power, scrambler type, and scrambler codes for enhanced features.
Details on connecting GPS, speakers, hailers, antennas, microphones, and power supply cables.
Lists supplied accessories, antenna importance, fuse replacement, and microphone hanger usage.
Instructions for mounting the transceiver using the supplied bracket for overhead or dashboard placement.
Specific steps for installing the optional MB-75 flush mount kit for panel integration.
Guides for installing optional scrambler units (UT-112/UT-98) and the HM-162E microphone.
A table listing common problems, their potential causes, and recommended solutions for user assistance.
Detailed technical specs for general, transmitter, and receiver functions of the transceiver.
Provides physical dimensions and a list of available optional accessories for the IC-M505.
A table listing international VHF marine channels with their transmit and receive frequencies.
A table listing USA VHF marine channels with their transmit and receive frequencies.
A diagram for cutting holes required for the MB-75 flush mount installation on a panel.