Dear Civil Aviation Authority,
I should be most grateful if the CAA references the CAA or ICAO document and specific references where a starter strip can dual as a RESA, with part of the RESA length being secured at the expense of eliminating the 60m runway end strip. Neither CAP168, nor ICAO Annex 14 appears to detail such an approval.
Ronaldsway (Isle of Man) airport cites runway strip dimensions as: 1796m x 300m for runway 08/26, with a runway length of 1837m . The strip marker points are detailed on the runway and visible on Google Maps. A more rigorous study of the runway configuration, reveals the starter strips being incorporated into the calculation of TORA and other runway parameters. However, it also becomes clear that the quoted RESA values are calculated from the strip end marker point. The TORA runs directly into the RESA and there is no 60m buffer strip – an important safety criterion of the ICAO and CAA. It is also noted that the starter strip comprises part of the RESA - as does part of the displaced runway threshold (for both 08 and 26).
A fundamental criterion for a RESA is a total decoupling from the runway declared distances. That is to say, it is an independent variable. The above example appears to violate this criterion and clarification is required.
This request is not unique and a similar example is cited in . In this case, a 150m starter strip is utilised as a RESA. However, in this case, the overrun value for the RESA is reduced by 60m to accommodate the runway end strip, with the RESA satisfying the 90m minimum requirement. Isle of Man appears to quote the 240m as a blanket figure for both overshoot and overrun on 08/26, is this correct?
Please cite other Code 4 UK airport runways where the absence of the 60m runway strip has been approved whilst (apparently) declaring the recommended 240m RESA for both overrun and overshoot conditions.
Thank you in advance.
(Dr.) Lawrence jones
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