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Garmin GPSMAP 740/740s Accessories

Garmin accessories for the Garmin GPSMAP 740 and GPSMAP 740s marine chartplotters. All of the GPSMAP 740 accessories available to purchase from ActiveGPS are genuine Garmin parts.

All of the Garmin GPSMAP 740 accessories marked as 'in stock' are available today and can be delivered as quickly as the next working day delivery when you choose our Next Working Day Delivery at £9.99. If there is no urgency when you receive your order we offer FREE UK delivery on all orders of £40 or more (delivered typically 3-5 workings days). We also deliver right around the world, prices start from £14.99. please see the basket pages or delivery page for more information.

Garmin Transducers and BlueChart marine charts are also available for use with the Garmin GPSMAP 740s. For further information please click here or scroll down this page past the GPSMAP 740 accessories below.

This heavy duty 7-inch cover fits the Garmin GPSMAP 740 and GPSMAP 740s chartplotter head unit snugly and protects the screen from getting scratched and guards against the harsh marine environment when not in use. More Details

Garmin GPSMAP 740/740s Protective Cover - £14.99

Garmin GPSMAP 740 gasket kit enables you to flush mount your GPSMAP 740 or 740s chartplotter. Flush mount kit includes hardware, installation instructions and a template. More Details

Garmin GPSMAP 740/740s Flush Mount Gasket - £12.99

Surface mount your Garmin GPSMAP 740 chartplotter using this genuine Garmin bail mount with knobs. To help achieve the best viewing angle of your GPSMAP 740 or GPSMAP 740s 7-inch display the mount also tilts for optimum viewing. More Details

Garmin GPSMAP 740/740s Bail Mount with Knobs - £17.99

Power or connect your Garmin GPSMAP 740 chartplotter to a network with this power/data cable. More Details

IMPORTANT: This cable is for GPSMAP 740 models WITHOUT a sounder, if you have a GPSMAP 740s model with sounder and require a cable with sounder/transducer connectivity you need to buy the accessory below.

Garmin GPSMAP 740 Power/Data Cable (19-pin) - £24.99

Power or connect your Garmin GPSMAP 740s chartplotter to a network with this power/data cable. This cable also includes sounder/transducer connectivity. More Details

Please note: This cable is only required if you own the GPSMAP 740s. If you own the GPSMAP 740 without sounder you can purchase the cable above.

Garmin GPSMAP 740s Power/Data/Sonar Cable (19-pin) - £29.99

Adding a Transducer to your GPSMAP 740s

Garmin transducers are fully compatible with the Garmin GPSMAP 740s and will provide you with a live 'view' beneath your boat. We stock the very latest Garmin transducers which can provide you with an image of not only what lies directly below but towards the front or sides of your boat with features such as SideVu, DownVu and RealVu 3D Forward.

To learn more about Garmin transducers please see our Garmin Transducer Buyer's Guide, the page also features an online form, which after completing we will email you a link to compatible transducers that are all fully compatible with your Garmin GPSMAP 740s and the boat in which you will use both nautical devices on.

Find your compatible transducer here.

Pictured below, transom mounted transducer, thru-hull transducer and in-hull transducer.

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Adding a Garmin BlueChart to your GPSMAP 740/740s

By adding either a Garmin BlueChart g3 or g3 Vision marine chart on SD/microSD card to your Garmin GPSMAP 740/740s chartplotter will provide the detailed digital marine charts on the screen of your device.

Garmin BlueChart g3 Vision marine charts are available in three different sizes, these are: Small, Regular and Large coverage. Please see the sample charts below, which all include the Thames Estuary:

The larger the chart coverage the more area is covered without the need to change or buy additional charts. We suggest buying the chart(s) that provide the coverage for your sailing, fishing or yachting needs.

Charts are available to buy from ActiveGPS for the waters around the UK, Western Europe, Mediterranean and North American coasts. Find your Garmin BlueChart.

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Why buy from us?

We are official Authorised Internet Retailers for Garmin. We sell genuine Garmin products, accessories and maps. We purchase from assigned Garmin UK distributors. We do not buy on the grey market and we do not sell counterfeit products. You can rest assured that by purchasing from ActiveGPS you will receive the full support of Garmin.

Page last updated: 25th February 2019

Buying a Marine GPS?

Garmin Transducer Buyer's Guide


We offer UK, Europe and Worldwide deliveries. We despatch orders at 5.30pm on Monday, Tuesday, Wednesday, Thursday and Friday. We need to receive your order on those days by 4.30pm. When possible we may despatch orders received after that time. No orders are despatched after 5.30pm and no orders are despatched on Saturday or Sunday.

We offer FREE UK delivery on all orders of £40.00 or more, plus next working day and guaranteed Saturday delivery options. Click here for further info. All options also appear at the basket pages.

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