e.g. 10, 15 and 20 m/s NOTE: For temperature rise data, similar tables would be included covering the other wind speeds and wind directions where any further local peaks were identified.
Wind speed at 10 m = 5 m/s Wind direction (degrees from Platform N) = 45
Y (m) z (m) 0 z (m) 5 z (m) 10 z (m) 15 z (m) 20 z (m) 25 z (m) 30
3 - second peak temperature °C
-25 0.5 1.5 0.2 0.2 0.1 0.2 0.2
-20 0.5 1.0 0.8 0.2 0.1 0.3 0.2
-15 0.7 1.3 3.2 3.9 0.2 0.4 0.2
-10 2.2 4.6 6.7 5.9 3.5 0.3 0.4
-5 4.1 7.9 7.4 8.7 5.2 0.3 0.3
0 5.8 11.8 8.3 9.3 4.1 0.1 0.1
5 2.3 6.5 9.1 8.5 8.3 2.0 0.3
10 1.9 5.0 7.7 10.0 5.4 0.4 0.2
15 0.7 3.4 5.2 6.8 2.7 0.3 0.2
20 0 0.5 3.8 2.3 0.7 0.3 0.2
25 0 0.5 0.5 0.2 0.2 0.2 0.3
Figure 10.20 - Lateral scan of temperature rise across the landing spot
10.10.3 Presentation of Flow Assessment Results for Operations
This section contains recommended formats for the presentation of a summary of the helideck flow assessment interpreted in terms of the operational restrictions that will need to be placed on flight operations.
This presentation should be prepared for each installation by a person competent in the interpretation of the wind flow data in terms of helicopter operations. It should then be submitted to BHAB Helidecks, together with the supporting detailed flow assessment results (presented as in Section 10.10.2). It is anticipated that BHAB Helidecks will then review the information, make any changes deemed necessary to the summary presentation, and then issue this summary to the helicopter operators.
It is intended that the presentation should be complementary to the Route Guide
(e.g. Aerad Plate), which currently provides the pilot with concise information on the physical layout of the installation, together with navigational and radio frequency information.
The requirements for this information are somewhat different if the installation is fixed at a particular heading, as is the case for fixed jacket platforms, semi-submersible production or drilling platforms, tension leg platforms etc., or if the installation is an FPSO or mobile drilling unit which changes its heading according to the weather and/or operational needs. Consequently two examples are provided. In Figure 25 an example is given of a presentation for a fixed platform, whilst Figure 26 contains an example for an FPSO.
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