On 1 January 2018 the law changes and all aircraft operating in airspace that requires the carriage of a radio must have 8.33 kHz-compatible equipment fitted and operational. After this date all 25kHz radios can no longer be used, unless specifically exempted for a particular channel such as the emergency frequency 121.5MHz. This means that all General Aviation (GA) aircraft must comply with this change to UK law to maintain safe communications with ground stations.

The UK leaving the EU will not affect the implementation of this new legislation.

We are expecting a surge in demand for 8.33 kHz radios and aircraft owners must plan early to ensure that they can source, buy and install compatible equipment before 1 January 2018.

Manufacturers, suppliers, maintenance organisations and licensed engineers may struggle to cope if there is a rush to buy and fit radios in late 2017. Consequently, the CAA is encouraging GA aircraft owners to purchase 8.33kHz radios early as we anticipate demand will be high as the deadline approaches.

The GA Unit, along with associations and key stakeholders, has identified a small number of common frequencies that may qualify for a limited duration exemption from the 8.33kHz implementation. The CAA submitted an exemption request to the European Commission in December 2016 that identifies these exemptions. The European Commission has 6 months to review this request and can refuse exemptions on the basis of significant 'network impact'. Exemption cannot therefore be confirmed until the review has taken place.

Although the CAA will confirm exemptions when they have been reviewed, it is anticipated that these exemptions will not be significant and that they will be of a limited duration. Any exemptions granted will not delay the change in UK legislation. In line with existing advice, users are encouraged to upgrade early and to take full advantage of the funding scheme.

The Innovation and Networks Executive Agency (INEA) awarded €4.3 million of EU funding for the CAA to use to assist the transition of aircraft to use 8.33 kHz voice communications. The funding will be distributed to aircraft owners or pilots to contribute toward the cost of new radio equipment.

The first call period for claims closed on 31 March 2017. Over 2,000 applications were received and all claims to that date will now be formally assessed.

The second call period is now open and will run to 30 September 2017.

The same eligibility criteria apply. Claims must be supported by receipts to show that payment for equipment has been made, and again, no pre-purchase funding claims are permitted.

For more information on funding see our 8.33 kHz funding application page.

More detail is contained in CAA Information Notice IN-2013/018.

We will announce news and regular updates on the 8.33 kHz implementation project for GA on this webpage.

To keep up to date with developments you can sign up for alerts through our Skywise system, which offers targeted alerts on news and information from across the CAA. You can access this system through a free app, email or website. For more information on Skywise, to download the app or sign up for alerts via email go to http://skywise.caa.co.uk/.

Following an agreement between EASA and the FAA, each organisation now mutually recognises TSO/ETSO approvals for certain aircraft products, which includes VHF radio communications equipment. In Europe there is no longer a requirement for a manufacturer to separately approve a piece of equipment that holds a TSO; the equipment can be installed and used as if it has the corresponding EASA approval. Further details on the scheme are at EASA website.

The CAA holds a list of common equipment, and the EASA and FAA lists can also be accessed online.

In certain circumstances the use of a LA3 approved 8.33 kHz radios may be appropriate. The CAA has issued an approval for handheld devices that meet certain stipulations.

Pilot owners should obtain confirmation from the manufacturer that their radio meets the conditions of the Approval. Once confirmed, the pilot may then use the Equipment Approval LA301075 as the reference when applying to the CAA for their Aircraft Radio Licence, which is required by the Wireless and Telegraphy Act. We are aware of the following 8.33 kHz handheld radios that meet the changeover requirement:

• ICOM IC-A6E
• ICOM IC-A24E
• Yaesu FTA-550
• Yaesu FTA-750

There may be other models that meet the requirement, although these are the ones currently identified to the CAA.