CAP 413
Radiotelephony Manual
Chapter 5 Page 11
1.10.4
Danger Area Activity Information Service
1.10.4.1 The nominated service unit will pass to the pilot, on request, an update on the known
activity status of the DA. Such an update will assist the pilot to decide whether it
would be prudent, on flight safety grounds, to penetrate the DA. A DAAIS does NOT
constitute a clearance to cross a DA.
1.10.4.2 When used by a DAAIS unit, the term 'active' means that, from the latest information
available to the unit, including activity times where known, the DA is notified as active
and it is not known whether there is activity taking place. Where a DACS is also
available for the DA, the pilot may be provided with the appropriate frequency. In RTF
transmissions DAAIS is pronounced “DAY-ES”.
1.10.4.3 Alternatively the service unit will advise the pilot that the DA is 'not active'. When
used by a DAAIS unit, 'not active' means that, from the latest information available to
the unit, the DA is not notified as active.
1.10.5
Full details of DACS/DAAIS can be found in the UK AIP and AICs.
Westbury Approach, G-ABCD,
request DAAIS for Danger Area 113
G-ABCD, Westbury Approach.
Danger Area 113 active (times as
appropriate), crossing service
available from Loudwater
Operations 123.450
Danger Area 113 active, G-ABCD
Westbury Approach, G-ABCD,
request DAAIS for Danger Area 113
G-ABCD, Westbury Approach.
Danger Area 113 not active
Danger Area 113 not active, G-ABCD
17 November 2011
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