Garmin Signal™ VHF 400 Marine VHF Radio with Built-in AIS Transponder
Total Price: (includes Signal™ VHF 400 Marine VHF Radio with Built-in AIS Transponder)
When you’re on the water, the Garmin Signal™ VHF 400 radio is your advanced communication solution. This all-in-one marine radio helps you stay aware on the water with built-in AIS transmit and receive capabilities. The sleek and modern design features a 3.5" colour touchscreen display and advanced system integration.
- VHF marine radio with AIS transmit and receive capabilities and a 3.5" colour touchscreen display
- Compact design with modern edge-to-edge glass takes up minimal space at the helm
- Eliminate unnecessary radio noise with automated squelch; replay radio messages with VHF audio playback; maintain watch on multiple channels with advanced watch modes
- Maintain situational awareness with the built-in Class B AIS SOTDMA transponder
- Quickly hail nearby vessels by using intuitive Class D DSC
- Includes fist mic with adaptive background noise cancellation and built-in speaker (5-watt RMS)
- Simple installation since VHF/DSC/AIS features only require a single VHF antenna and the GPS antenna/receiver is built into the unit
- Seamless Garmin chartplotter integration via the NMEA 2000® network and Garmin Marine Network
- Configure the radio, program the MMSI number, and get over-the-air software updates with the ActiveCaptain® smartphone app via built-in Wi-Fi® connectivity
BUILT‑IN AIS

Stay aware on the water with built-in AIS transmit and receive capabilities. This feature shows you range, course, speed and the crossing situation of other AIS-equipped vessels around you to help you navigate.
SLEEK DESIGN

The compact and modern design features edge-to-edge glass and takes up minimal space at the helm.
CLEAR AND SIMPLE COMMUNICATION

Eliminate unnecessary radio noise with automated squelch. If you miss a radio message, you can replay it with VHF audio playback. When you need to maintain watch on multiple channels, advanced watch modes make it easy.
STAY CONNECTED

Quickly transmit a distress signal to nearby vessels with the distress button, which uses Class D DSC to automatically send crucial information that can help emergency responders. You can also use the intuitive DSC features to quickly initiate contact with other AIS-equipped vessels - simply select the vessel on the AIS plotter view, and call them with a tap of a button.
EASY TO UPDATE

Configure the radio, program the MMSI number, and get over-the-air software updates with the ActiveCaptain® smartphone app via built-in Wi‑Fi® connectivity.
INSTALLATION IS A BREEZE

Installation is simple since VHF/DSC/AIS features only require a single VHF antenna and the GPS antenna/receiver is built into the unit. Chartplotter integration is seamless via the NMEA 2000® network and Garmin BlueNet™ Network.
Features Summary
- Adaptive noise cancellation
- Audio record and playback
- Auto squelch
- Dual/Tri watch
- Presets watch
- NOAA weather alert
- NOAA weather watch
- Loud hailer
- Loud Hailer listen-back
- Intercom support
- AIS target display
- AIS collision and MOB alarms
- AIS stealth mode
- Integrated AIS transponder
- All U.S., Canadian and International marine channels; NOAA weather channels
- Integrated GNSS receiver
- Integrated GNSS antenna
- Night vision mode
Specifications
- Dimensions:
- Head Unit: 75 x 160 x 104 mm (3″ x 6.3″ x 4.1″)
- Fist Mic: 100 x 60 x 31 mm (3.9″ x 2.4″ x 1.2″)
- Weight:
- Head Unit: 655 g (1.45 lbs)
- Fist Mic: 245 g (0.54 lbs)
- Operating voltage: 9.6 - 32 VDC
- Typical current draw at 12 Vdc
- Head Unit: 700 mA, 6 A max
- Fist Mic: 90 mA, 0.9 A max
- Compass safe distance Head Unit: 70 cm (27.6″)
- Fist Mic: 15.8 cm (40″)
- VHF transmit power (max): 25 W, 1 W (high, low)
- Water rating: IPX7
- Display Type: Colour IPS LCD, capacitive touch
- Display Size: 3.5″ (89 mm)
- Display Resolution: 640 x 480 pixels
- Operating temperature: –20° to 55° C (–4° to 131° F)
- Inland waterways (ATIS): Compatible
- Backlight: 1,000 nits
- Multi-language interface: Yes
- Max speaker output power: Fist Mic: 5 W RMS, < 1% THD
- Max external speaker output power: 15 W RMS, < 1% THD, 4 Ω
- Max hailer loudspeaker output power: 25 W RMS, < 1% THD, 4 Ω
- AIS class: SOTDMA Class B
- AIS power output: 5W
In The Box
- Garmin Signal™ VHF 400 head unit
- Fist mic
- Sun cover
- Head unit power and external audio cable with fuse (2 m)
- Fist mic power cable with fuse (2 m)
- Cable for Garmin BlueNet™ Network (2 m)
- Mounting hardware
- Mounting template
- Documentation
Click here for the User manual
Click here for the Mounting template
Wi-Fi is a registered trademark of the Wi-Fi Alliance.
This item is currently not in stock but is available to preorder, with a lead time of up to 14 days.
Stock can move quickly, so this is just a suggestion of current levels, please phone the shop to confirm.
The ship to store service is based on Head Office sending stock to a branch.
If you wish to call & collect stock, please do so over the phone using the number provided.
| Store | Availability | Telephone |
|---|---|---|
| Cardiff | Not currently in stock | 02920 220929 |
| Chichester | Not currently in stock | 01243 773788 |
| Deacons | Not currently in stock | 02380 402182 |
| Lymington | Not currently in stock | 01590 673698 |
| Port Hamble | Not currently in stock | 02380 454858 |
| Plymouth | Not currently in stock | 01752 548301 |
| Poole | Not currently in stock | 01202 723311 |
| Southampton | Not currently in stock | 02380 632 725 |
| Gloucestershire (Distribution Hub) | Good availability | 0345 130 0710 |
Our Mail Order team ship chandlery, yacht parts and sailing clothing around the world. We use the best value couriers available, and we will endeavour to get your products to you as quickly and as cost effectively as possible.
International Orders: International shipping charges will be calculated and advertised at checkout. Pricing may vary. International orders must be placed online and from a location outside of the UK. Our mailorder team are unable to facilitate the placement of international orders.
UK Standard Delivery
- UK Mainland 0 - 2Kg (small jiffy) £3.95 Royal Mail Service. Despatch within 3- 5 working days, delivery in 7-10 working days for orders under £100.00. This is an estimated delivery window from our chosen courier.
- UK Mainland 0 - 30KG £5.95 Courier service with signature. Despatch within 3- 5 working days, delivery in 7-10 working days. This is an estimated delivery window from our chosen courier.
- UK Mainland 0 - 30KG OVER 1.2m LENGTH £15.95 Courier service with signature. Despatch within 3- 5 working days, delivery in 7-10 working days. This is an estimated delivery window from our chosen courier.
- UK Mainland 30KG+ Price on request
- UK Mainland Next Day 0 - 30KG £9.95 Courier service with signature, orders must be placed before midday. This is an estimated delivery window from our chosen courier.
- UK Mainland Next Day 0 - 30KG OVER 1.2m length £19.95 Courier service with signature, orders must be placed before midday. This is an estimated delivery window from our chosen courier.
- UK Mainland Saturday 0 - 30KG £19.95 Courier service with signature, orders must be placed before Friday. This is an estimated delivery window from our chosen courier.
- Northern Ireland, Highlands & Islands 0 - 2KG (small jiffy) £3.95 Royal Mail Service. Despatch within 3- 5 working days, delivery in 7-10 working days for orders under £100.00. This is an estimated delivery window from our chosen courier.
- Northern Ireland, Highlands & Islands 1 - 30KG £10.95-£14.95 Courier service with signature. Despatch within 3- 5 working days, delivery in 7-10 working days
- Northern Ireland, Highlands & Islands 1 - 30KG OVER 1.2m length from £24.95 Courier service with signature. Despatch within 3- 5 working days, delivery in 7-10 working days
- Northern Ireland, Highlands & Islands 30KG+ Price on request
- Channel Islands 0 - 2KG (small jiffy) £5.95 Royal Mail Service Despatch within 3- 5 working days, delivery in 7-10 working days for orders under £50.00
- Channel Islands 1 - 30KG £19.95 Courier service with signature. Despatch within 3- 5 working days, delivery in 7-10 working days
- Channel Islands 30KG+ Price on request
UK Exceptional Delivery
- UK Mainland; Antifoul & paints £5.95
- UK Mainland; Inflatable dinghy £10.00
- UK Mainland; Liferafts £29.95
- UK Mainland; Flares £49.95
- Northern Ireland, Highlands & Islands; Antifoul & paints £9.95
- Northern Ireland, Highlands & Islands; Inflatable dinghy price on request
- Northern Ireland, Highlands & Islands; Liferafts price on request
- Northern Ireland, Highlands & Islands; Flares not available to ship at this time
- Channel Islands; Antifoul & paints £16.95
- Channel Islands; Inflatable dinghy price on request Channel Islands; Flares not available to ship at this time
Ship to Store service; You can now order from our website for collection from one of our 8 Force 4 locations. Simply select “Ship to Store” at checkout and your goods will be ready for collection within 5 working days. This service is free however may exclude some hazardous or special order goods.
For further delivery information click here.
Standard Returns
If you are not entirely happy with your purchase, we will exchange or refund your goods in full, provided that the items are returned within 14 days of receipt.*
Please check the condition of goods on arrival - we are unable to accept goods damaged during shipping after 14 days.
Returned goods must be packaged securely, with all original packaging undamaged and in a saleable condition i.e. shoe boxes must be in the same condition as when received.
Goods must be unused and security seals intact.*
If you would like to return goods because they were ordered incorrectly or if clothing does not fit, return postage will be at your expense. If you would like us to replace the goods with another size or colour, we will charge carriage on the replacement.
Please be aware that some navigational and safety products may be dated, and as such a full refund may in some cases not be possible. If you are purchasing dated navigational charts we suggest you contact us for more information.
Faulty Goods
If you receive your goods and believe them to be faulty, please contact us straight away with a brief description of the problem. If we require you to return the product for a replacement, we will send you a pre-paid Royal Mail label for delivery back to us. Unfortuantely we cannot send the courier back to collect the items.
Returning goods to Force 4 is easy!
- Please contact us by ringing 0345 1300 710 or email on [email protected]. This way we'll be able to determine whether you would like to return the product for a refund or whether you'd like to exchange the product. We are unable to process the return of faulty goods that we're not expecting.
- We'll then give you a returns number. This returns number will need to be clearly marked on the outside of your parcel so it can be identified on arrival. Please note, failure to mark a returns reference number on the outside of your parcel may result in a delay in processing your return.
- Don't forget your proof of postage, just in case!
- Once we receive the item we'll be able to proceed with a refund or an exchange.
*this excludes faulty goods with manufacturers defects. If goods are found to be faulty during use, after the returns period, please just give us a ring on 0345 1300 710 and we'll be happy to help.
Stock Alert
Please alert me via email when this product is back in stock.
Ask a question
Men's Size Guide
| To Fit Height | To Fit Chest | |
|---|---|---|
| X SMALL | 5'2" - 5'4" | 34 - 36" |
| SMALL | 5'5" - 5'7" | 36 - 38" |
| MEDIUM | 5'7" - 5'10" | 38 - 40" |
| LARGE | 5'11" - 6'1" | 41 - 43" |
| X LARGE | 6'1" - 6'3" | 44 - 46" |
| XX LARGE | 6'3" - 6'5" | 46 - 48" |
Shoe Sizes
| UK | EURO | MENS US | LADIES US |
|---|---|---|---|
| 3.5 | 36 | 5.5 | |
| 4 | 37 | 6 | |
| 4.5 | 37.5 | 6.5 | |
| 5 | 38 | 5.5 | 7 |
| 5.5 | 38.5 | 6 | 7.5 |
| 6 | 39.5 | 6.5 | 8 |
| 6.5 | 40 | 7 | 8.5 |
| 7 | 40.5 | 7.5 | 9 |
| 7.5 | 41.5 | 8 | 9.5 |
| 8 | 42 | 8.5 | 10 |
| 8.5 | 42.5 | 9 | |
| 9 | 43 | 9.5 | |
| 9.5 | 44 | 10 | |
| 10 | 44.5 | 10.5 | |
| 10.5 | 45 | 11 | |
| 11 | 45.5 | 11.5 | |
| 11.5 | 46.5 | 12 | |
| 12 | 47 | 12.5 | |
| 12.5 | 47.5 | 13 | |
| 13 | 48 | 13.5 | |
| 14 | 50 | 14.5 |









