(c)  The pilot must at all times remain in flight conditions which enable him to determine his flight path and keep clear of obstacles;
 
The following general conditions are also applicable to Special VFR flights:
 
(a)  It may be necessary for ATC purposes to impose a height limitation or routing instructions on a Special VFR clearance.
 
(b)  Special VFR clearance will not normally be granted for aircraft with an All Up Weight greater than 5700 kg and that are capable of flight under IFR.
 
(a) Special VFR clearance will only be granted when traffic conditions will enable the flight to take place without hindrance to normal IFR flights.

 
(b) Weather limitations for Special VFR flights arriving at or departing from certain aerodromes may be detailed in the UK AIP.  Without prejudice to such limitations, ATC will not issue a Special VFR clearance to any fixed wing aircraft intending to depart from an aerodrome in a Control Zone when the official meteorological report indicates that the visibility is 1800 m or less and/or the cloud ceiling is less than 600ft.

 
(e)  A Special VFR clearance does not absolve the pilot from the responsibility of complying with the appropriate ATZ Rules.
 
(f)  A Special VFR clearance does not absolve the pilot from the relevant Low Flying Rules (Rule 5 of the UK Rules of the Air Regulations refers) other than the ‘1000ft’ element of Rule 5 where the clearance permits flight below that height. In particular it does not absolve the pilot from the requirement of that Rule when flying over a congested area (and elsewhere for a helicopter) to operate the aircraft at such a height as would enable it to alight without danger to persons and property on the ground in the event of an engine failure.
 
(g)  In certain Control Zones particular routes and/or the ATZ may be notified which permit the pilot to operate on a Special VFR Clearance in a flight visibility of less than 10 km without the requirement to hold a Instrument or IMC Rating (Schedule 8 of the UK Air Navigation Order refers).
 
(h)  A full flight plan is not required (unless the pilot requires the destination aerodrome to be advised), but details of the flight must be passed, either by RTF or, at busy aerodromes, through the Flight Briefing Unit, to enable ATC to issue a clearance.
 
(i)  ATC will provide standard separation between all Special VFR flights and between IFR flights and Special VFR flights.
 
 
The following loss of communications procedures apply to Special VFR flights:
 
(a)  If the aircraft is suitably equipped, Squawk 7600 with Mode C.
　
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本文鏈接地址：Guide to Visual Flight Rules (VFR) in the UK(22)