Marine VHF Radios for Ships and Commercial Vessels in India

Communication on a ship is very different from communication inside a hotel, warehouse or factory.

A commercial vessel may need communication between:

• Bridge personnel
• Deck crew
• Engine-room teams
• Port authorities
• Other vessels
• Shore stations
• Pilot operations
• Safety personnel
• Maintenance teams

The equipment used for these applications should therefore not automatically be treated as an ordinary business walkie-talkie.

Marine VHF is a specialised radio service designed for maritime communication.

It uses internationally coordinated maritime channels within the VHF band and supports communication such as ship-to-ship and ship-to-shore radio traffic.

For commercial vessels, ferries, workboats, fishing vessels and other marine operations, selecting the correct equipment requires understanding:

• Marine VHF
• Handheld and fixed radios
• Antennas
• Environmental protection
• DSC
• Emergency communication
• Licensing and authorisation

This guide explains the practical differences.

---

Marine VHF Is Not the Same as a Normal VHF Walkie-Talkie

This is the most important point for first-time buyers.

A conventional professional VHF walkie-talkie and a marine VHF radio may both operate within the broader VHF part of the radio spectrum, but they are intended for different radio services.

A normal professional land-mobile radio may be used for applications such as:

• Factory communication
• Security teams
• Construction sites
• Warehouses
• Facility management

Marine VHF equipment is designed around maritime communication channels and operating procedures.

Therefore, a generic programmable business radio should not automatically be treated as a replacement for approved marine radio equipment.

Electrosonic’s VHF vs UHF walkie-talkie guide explains the basic propagation differences between VHF and UHF, but marine communication requires additional maritime-specific considerations.

---

Ports and Ships Have Different Communication Requirements

This distinction is also important.

A container terminal may use professional land-mobile radios to coordinate:

• Crane operators
• Security
• Yard teams
• Gate staff
• Maintenance workers

Those radios serve the port operation.

Once communication involves the vessel’s maritime radio system, ship-to-ship traffic or ship-to-shore maritime communication, a different radio service is involved.

Electrosonic’s guide to walkie-talkies for ports and container terminals covers the shore-side operational requirement separately.

A large maritime operation may therefore use both:

Land-mobile radios for terminal operations

and

Marine radios for vessel communication

They should not be confused.

---

Who Uses Marine Radios?

Depending on the vessel and operation, marine communication equipment may be used by:

• Ship masters
• Bridge officers
• Deck officers
• Deck crew
• Pilots
• Workboat operators
• Fishing-vessel crews
• Ferry crews
• Harbour craft
• Tug crews
• Offshore support personnel

The exact radio equipment required depends on the vessel, operating area and regulatory requirements.

---

Ship-to-Ship Communication

Marine VHF can be used when vessels need to communicate with one another within radio range.

Examples may include coordination relating to:

• Vessel movements
• Navigation
• Traffic situations
• Safety
• Harbour operations
• Working operations

Marine channels are internationally coordinated rather than being arbitrary user-programmed business frequencies.

The ITU describes ship-to-ship and ship-to-shore communication as two of the major maritime VHF use cases.

---

Ship-to-Shore Communication

A vessel may also need to communicate with:

• Coast stations
• Port stations
• Vessel Traffic Services
• Harbour authorities
• Pilots
• Other maritime services

The appropriate channel and procedure depend on the service and location.

Marine radio users should therefore follow the applicable maritime channel plan and operating procedures rather than choosing channels in the way a private business might organise an internal walkie-talkie fleet.

---

What Is VHF Channel 16?

Channel 16 is one of the most important channels in maritime radiotelephony.

For VHF maritime distress communication, IMO guidance identifies:

Channel 16 — radiotelephone distress and safety traffic

and

Channel 70 — Digital Selective Calling (DSC)

for distress and safety alerting.

Channel 16 should therefore not be treated as a casual general-purpose company chat channel.

Proper maritime radio procedures should be followed.

---

What Is DSC?

DSC stands for Digital Selective Calling.

Rather than relying entirely on voice calling, compatible maritime radios can use digital signalling for calling and distress alerting.

For VHF maritime systems, Channel 70 is used for DSC.

Depending on the equipment and installation, DSC can support functions such as:

• Distress alerting
• Individual station calling
• Safety calling
• Identification using maritime identities

DSC is an important part of modern maritime safety communication and the Global Maritime Distress and Safety System.

However, simply buying a radio containing a DSC button does not replace operator training, correct registration, MMSI configuration or applicable regulatory requirements.

---

Handheld Marine VHF vs Fixed-Mount Marine VHF

One of the main buying decisions is whether the application needs:

• A handheld radio
• A fixed radio
• Or both

Handheld Marine VHF

A handheld marine VHF radio is portable.

This can make it useful for:

• Deck crew
• Small boats
• Tender operations
• Pilots
• Maintenance personnel
• Backup communication
• Crew members moving around a vessel

The main advantage is mobility.

The main limitation is that a portable radio uses a relatively small antenna positioned close to the user.

That normally limits practical range compared with a properly installed fixed radio using a high external antenna.

---

Fixed-Mount Marine VHF

Fixed radios are installed aboard the vessel.

They are typically connected to an external antenna positioned higher on the vessel.

For VHF communication, antenna height can have a major effect on practical range because marine VHF communication is largely line-of-sight.

This makes antenna location extremely important.

A fixed installation may also integrate features such as:

• DSC
• GPS/GNSS information
• External speakers
• Remote microphones
• Other onboard systems

depending on the equipment.

---

Why Antenna Height Matters at Sea

Open water appears to provide an ideal communication environment because there are relatively few buildings or hills.

However, VHF communication is still limited significantly by line-of-sight geometry.

This means the height of the transmitting and receiving antennas can matter enormously.

For example:

A radio antenna several metres above sea level may communicate farther than a handheld radio being used close to deck level.

Therefore, when a vessel needs greater reliable range, the solution is not always:

“Buy the most powerful handheld radio.”

A properly installed antenna system may be much more important.

Electrosonic’s walkie-talkie antenna guide explains the broader principle that antenna matching and condition strongly affect radio performance.

---

Range: Don’t Believe One Fixed Kilometre Number

Marine VHF radios do not have one guaranteed communication distance.

Practical range can depend on:

• Antenna height
• Vessel height
• Receiving-station antenna
• Transmitter power
• Antenna quality
• Cable losses
• Sea conditions
• Equipment condition
• Physical obstructions

Open water can provide excellent conditions compared with dense urban environments, but VHF remains largely line-of-sight.

This is why buyers should be cautious about simple claims such as:

“This radio has a 20 km range.”

Electrosonic’s real-world guide to walkie-talkie range explains why radio range cannot be reduced to one marketing number.

---

Waterproofing Matters Much More at Sea

A radio carried on a vessel may be exposed to:

• Rain
• Spray
• Humidity
• Wet hands
• Deck wash
• Accidental drops into water

Environmental protection therefore matters more than it does for many indoor business applications.

When comparing marine handheld radios, buyers should examine the exact manufacturer specification rather than accepting vague descriptions such as:

• Waterproof
• Water resistant
• Marine grade

Look for a clearly stated IP rating and the manufacturer’s specified immersion conditions.

Electrosonic’s IP54 vs IP55 vs IP67 vs IP68 guide explains how ingress-protection ratings work.

Remember:

IP67 and IP68 are not the same thing, and two IP68 products do not necessarily have identical immersion specifications.

---

Salt Water Requires Extra Attention

Salt-water environments are particularly demanding.

A high IP rating tells you about defined water and dust ingress protection.

It does not automatically guarantee resistance to:

• Long-term salt corrosion
• Chemical exposure
• Repeated seawater immersion
• Neglected connectors
• Damaged seals

For marine use, follow the radio manufacturer’s cleaning and maintenance instructions.

Connector covers, battery seals and accessory ports should remain in good condition.

---

Floating Handheld Radios

Some marine handheld radios are designed to float if accidentally dropped overboard.

This can be extremely useful for:

• Small boats
• Deck crews
• Workboats
• Fishing vessels
• Tender operations

However, do not assume every waterproof radio floats.

Waterproof and floating describe different capabilities.

If flotation is important, check that the specific model explicitly provides it.

---

Battery Life at Sea

A portable marine radio is useful only while its battery remains charged.

Operators should consider:

• Shift duration
• Transmit activity
• Standby time
• Battery age
• Charging availability
• Spare batteries
• Emergency reserve requirements

A radio that comfortably works for a normal six-hour recreational trip may not necessarily be suitable for a long commercial duty period.

Electrosonic’s walkie-talkie battery life guide explains why battery runtime depends on actual usage rather than mAh capacity alone.

For important onboard communication, battery planning should include sufficient reserve.

---

Charging Equipment

Before purchasing handheld radios, check:

• Charger voltage
• Vessel power availability
• Charging cradle
• Spare-battery charging
• Multi-unit charging options
• Mounting arrangements

Radios that are frequently moved around a vessel should also have a clear issue-and-return procedure.

---

Speaker Microphones and Other Accessories

Deck employees may benefit from accessories such as:

• Speaker microphones
• Earpieces
• Carrying cases
• Belt clips
• Spare batteries
• Charging cradles

But accessories should be selected carefully for marine conditions.

A waterproof radio connected to an inappropriate accessory may not retain the same level of environmental protection.

Always check compatibility with the specific radio.

---

Audio Must Work in a Noisy Environment

Ships can be noisy workplaces.

Radio users may operate around:

• Engines
• Wind
• Waves
• Pumps
• Machinery
• Deck equipment

Therefore, a marine radio should not be evaluated only by how loud the speaker sounds inside a quiet showroom.

Test:

• Speech intelligibility
• Microphone performance
• Speaker clarity
• Operation with gloves
• Controls in wet conditions

Reliable audio is more important than an impressive specification sheet.

---

Radios for Deck Crew

Crew members moving around the vessel often need portable communication.

Handheld radios can support operational coordination where permitted by the vessel’s communication plan.

Useful characteristics may include:

• Rugged body
• Water protection
• Simple controls
• Clear audio
• Good battery life
• Suitable carrying accessories
• Large push-to-talk button

Crew equipment should remain easy to operate in poor weather and while wearing work gloves.

---

Bridge Communication

The bridge may rely on fixed maritime radio equipment for external communication.

Depending on the vessel and regulatory requirements, communication systems may include more than VHF alone.

Larger commercial vessels can have maritime safety communication obligations that go far beyond a simple handheld radio.

Therefore, purchasers should not attempt to design a complete ship radio installation solely from a retail equipment list.

The required system can depend on factors such as:

• Vessel type
• Operating area
• Voyage
• Safety requirements
• Applicable regulations

---

Fishing Vessels

Fishing vessels can have particularly strong reasons to maintain reliable radio communication.

Operations may involve:

• Long working periods
• Exposure to seawater
• Remote operating areas
• Crew working on deck
• Coordination with other vessels

Equipment durability, battery condition and waterproofing can therefore become especially important.

India’s DoT maintains specific maritime licensing documentation for ships and also separately lists Maritime Mobile Station licensing requirements for fishing trawlers and boats.

---

Ferries and Passenger Vessels

Passenger vessels may require communication among:

• Bridge personnel
• Deck staff
• Passenger-service teams
• Engineering personnel
• Security
• Shore operations

Internal crew communication and external maritime communication may not necessarily use the same equipment or radio service.

That distinction should be identified before purchasing radios.

---

Workboats, Tugs and Harbour Craft

Smaller commercial vessels frequently operate around:

• Ports
• Terminals
• Harbours
• Offshore facilities

These operations can require close coordination between vessels and shore-side organisations.

Marine VHF may support appropriate maritime communication, while land-based terminal staff may simultaneously use their separate business radio network.

Again, the two systems serve different purposes.

---

Marine VHF and GMDSS

GMDSS stands for the Global Maritime Distress and Safety System.

It is an international framework designed to support distress alerting and maritime safety communication.

Depending on vessel requirements and operating area, a compliant GMDSS installation can involve much more than a VHF handheld radio.

It can include different terrestrial and satellite communication systems and emergency equipment.

IMO identifies VHF Channel 70 for DSC distress and safety calling and Channel 16 for corresponding VHF radiotelephone distress and safety traffic.

Businesses should therefore avoid using the term “GMDSS radio” casually unless the equipment and installation actually meet the relevant requirements.

---

Do Marine Radios Require Licensing in India?

This is one area where marine VHF differs substantially from ordinary consumer walkie-talkies.

The Department of Telecommunications currently identifies a Maritime Mobile Station License (MMSL) for maritime communication systems aboard ships and vessels.

The DoT describes the service as covering maritime communication systems used on vessels operating in territorial and international waters. Its documentation includes items such as ship registration, MMSI/call-sign information, equipment details and related maritime documentation.

As of 2026, DoT has also moved new authorisation processes under the Telecommunications Act, 2023 to its newer Authorisation Portal. Businesses should therefore check the current DoT/WPC process at the time of application rather than relying on an old licence application guide.

Do not assume that purchasing a marine VHF radio automatically gives permission to install and operate it.

---

What Is an MMSI?

MMSI stands for Maritime Mobile Service Identity.

It is a unique numerical identity used in maritime communication systems.

Compatible systems can use the MMSI in functions such as DSC calling.

Where equipment requires MMSI programming, the number should be obtained and configured through the proper applicable process.

It should not simply be invented by the radio user.

---

Operator Qualifications May Also Matter

Depending on the vessel, system and applicable regulatory requirements, qualified radio operators may be required.

The DoT separately maintains the process for the Commercial Radio Operator Certificate of Proficiency to Operate Global Maritime Distress and Safety System.

The appropriate operator certification should therefore be determined as part of the vessel’s compliance planning.

---

Don’t Use Marine Emergency Channels for Routine Chatter

A professional maritime radio system needs operating discipline.

Crew should understand:

• Calling procedures
• Working channels
• Emergency procedures
• Distress terminology
• Channel restrictions
• Radio identification

Channel 16 and DSC Channel 70 have specific safety roles and should be treated accordingly.

Training is therefore part of a good radio deployment.

---

Handheld Radio as Backup

Portable marine radios can be useful as backup communication tools because they:

• Operate independently from a fixed installation
• Can be moved around the vessel
• Have their own batteries
• Can accompany crew to different locations

However, a handheld should not automatically be considered a substitute for equipment that a particular vessel is required to carry.

Regulatory carriage requirements should always be checked separately.

---

How Many Marine Handheld Radios Does a Vessel Need?

There is no universal number.

Start by identifying:

• Number of crew requiring simultaneous portable communication
• Bridge requirements
• Deck positions
• Engineering teams
• Safety procedures
• Shift patterns
• Backup units
• Regulatory carriage requirements

For operational radios, a simple example might look like:

Position	Example Quantity
Bridge / Master	1
Deck Supervisor	1
Deck Crew	3
Engineering	2
Safety / Backup	2
Total	9

This is only an operational illustration.

It is not a statement of statutory carriage requirements.

Applicable maritime rules must determine mandatory equipment.

---

Fixed Radio Buying Checklist

When evaluating a fixed marine VHF system, consider:

1. Is the equipment intended and approved for maritime use?
2. Does it support the required maritime channels?
3. Is DSC required?
4. How will MMSI be configured?
5. Where will the antenna be installed?
6. What antenna and cable will be used?
7. Is GPS/GNSS integration required?
8. Does the installation need an external speaker?
9. Is backup power required?
10. What licensing and inspection requirements apply?

Installation quality can be as important as the radio itself.

---

Handheld Marine Radio Buying Checklist

For handheld radios, consider:

1. Waterproof/IP rating
2. Manufacturer immersion specification
3. Whether the radio floats
4. Battery runtime
5. Spare-battery availability
6. Charging arrangements
7. Speaker volume and intelligibility
8. Large controls
9. Glove-friendly operation
10. Belt clip or carrying method
11. DSC/GPS features where required
12. Marine channel support
13. Regulatory suitability
14. Availability of service and batteries

---

Don’t Buy Solely on Maximum Range

A marine radio advertisement may promote a large range figure.

But the radio’s antenna may be more important than buyers expect.

Two identical radios can achieve very different results if:

• One antenna is higher
• One antenna is damaged
• Cable loss differs
• One user is below deck
• One vessel has a better antenna installation

Choose the complete communication system rather than simply the handset with the biggest number printed on the box.

---

Don’t Buy Solely on IP Rating Either

Water protection is important at sea.

But a good marine radio also needs:

• Clear audio
• Correct channels
• Reliable battery
• Suitable controls
• Regulatory compliance
• Proper antenna
• Service support

An IP68 radio with the wrong radio-service capability is not the right marine communication solution.

---

Marine Radio Maintenance

Equipment exposed to marine environments deserves routine inspection.

Check:

Antenna

Look for physical damage or corrosion.

Connectors

Check for moisture and corrosion.

Battery

Ensure it charges and locks correctly.

Housing

Inspect for cracks.

Seals

Check covers and accessory seals.

Speaker and Microphone

Confirm clear communication.

Charging Contacts

Keep them clean and dry.

Emergency Functions

Test according to approved maintenance procedures without generating false distress alerts.

Salt exposure can accelerate deterioration, so manufacturer-approved cleaning procedures should be followed.

---

When Should a Marine Radio Be Replaced?

Consider replacement when:

• Housing is damaged
• Seals are compromised
• Battery runtime becomes unreliable
• Audio becomes poor
• Controls malfunction
• Corrosion appears
• Required features are no longer supported
• Repairs become uneconomical
• Regulatory requirements have changed

Mission- or safety-related communication equipment should not be kept in service merely because it still powers on.

---

Marine Radio vs Ordinary Walkie-Talkie: Quick Comparison

Feature	Marine VHF Radio	Land-Mobile Walkie-Talkie
Primary Use	Vessel/maritime communication	Business/site communication
Channel Structure	Maritime channels	Business radio channels
Ship-to-Ship	Yes, where applicable	Not its intended service
Ship-to-Shore Maritime	Yes	Not its intended service
DSC	Available on suitable marine equipment	Generally not a land-mobile feature
Marine Distress Use	Designed within maritime system	No
Waterproof Models	Common	Available on rugged models
Licensing	Maritime requirements apply	Depends on land-mobile system/frequency
Typical Users	Ships, boats, marine operators	Security, factories, hotels, warehouses

The two categories solve different communication problems.

---

Choosing the Right Marine Radio System

A small workboat may have very different requirements from a large commercial vessel.

Likewise:

• Fishing vessel
• Ferry
• Tug
• Offshore support vessel
• Harbour craft
• Passenger vessel

can all have different operating conditions.

The correct solution depends on:

• Vessel type
• Size
• Operating waters
• Communication range
• Crew size
• Regulatory requirements
• GMDSS requirements where applicable
• Fixed vs portable requirements
• Environmental exposure
• Backup requirements

This is why vessel communication equipment should be selected from the actual operating profile rather than by simply searching for the “best walkie-talkie for ships.”

---

Need Help Selecting Marine Communication Equipment?

Electrosonic Technologies supplies professional communication equipment for commercial and institutional users in India.

For a marine radio enquiry, useful information can include:

• Vessel type
• Vessel size
• Area of operation
• Number of crew
• Fixed-radio requirement
• Handheld-radio requirement
• Existing radio equipment
• Antenna installation
• Required waterproofing
• Operational use case
• Licensing status

This helps determine whether the requirement involves marine VHF equipment, onboard operational radios, or a combination of communication systems.

Contact Electrosonic Technologies to discuss radio communication requirements for ships, commercial vessels, workboats and marine operations in India.

---

Frequently Asked Questions

Are normal walkie-talkies the same as marine VHF radios?

No. Marine VHF equipment operates within the maritime mobile radio service and uses internationally coordinated marine channels. Ordinary business radios are designed for different applications.

What is marine VHF used for?

It can support appropriate ship-to-ship and ship-to-shore maritime communication, including operational and safety communication.

What is Marine VHF Channel 16?

Channel 16 is used for VHF radiotelephone distress and safety traffic and has an important calling/safety role in maritime communication. It should not be treated as an ordinary company chat channel.

What is VHF Channel 70?

Channel 70 is used for Digital Selective Calling, including maritime distress and safety alerting.

Is a handheld or fixed marine VHF radio better?

They serve different purposes. Fixed radios can use higher external antennas and are suitable for installed vessel communication, while handheld radios provide portability for crew and backup use.

Does an IP67 marine radio float?

Not necessarily. Waterproof protection and flotation are separate specifications. Check the manufacturer’s exact product specification.

Is IP68 automatically best for marine use?

Not always. IP rating is only one factor. Marine suitability, controls, audio, battery life, regulatory approval and the manufacturer’s exact immersion specification also matter.

Do marine VHF radios require licensing in India?

Maritime radio systems are subject to Indian regulatory requirements. DoT provides a Maritime Mobile Station licensing/authorisation framework for communication systems aboard ships and vessels. Current requirements should be verified before installation or operation.

What is MMSI?

MMSI is the Maritime Mobile Service Identity used to identify maritime stations within compatible systems such as DSC.

Can a marine handheld replace a vessel’s fixed radio?

Not automatically. Mandatory equipment depends on the vessel and applicable maritime regulations. A handheld can be useful for portable or backup communication but should not be assumed to replace required fixed equipment.

Are port walkie-talkies and ship radios the same?

No. Port and terminal staff may use land-mobile professional radio systems, while vessels use maritime communication equipment for marine radio services.

Should marine radios be tested regularly?

Yes. Batteries, antennas, audio, charging equipment, seals and other components should be inspected according to manufacturer and vessel maintenance procedures.