Performance Solutions

New EU OPS Compliant Performance Solution for Norwegian Air Shuttle

TODCNavtech has now developed a TODC/LDC (Take-Off and Landing Distance Calculation) for Norwegian Air Shuttle that is fully EU OPS compliant for their EFB platform. Norwegian dispatches into challenging aerodromes on a regular basis, and this new feature will help their crew to do a legal dispatch calculation, as well as an operational assessment of the landing in one simple calculation.

In accordance with OPS 1.515 (c), Norwegian’s crew needs to determine what destination runway is the most favorable (normally the longest), and then do a dispatch landing calculation for this runway in zero wind. Next, they need to do a dispatch calculation on the runway most likely to be assigned (with estimated wind speed and direction). The lesser of these two weights will be their performance-limited landing dispatch weight. Needless to say, this can be a time consuming task prior to takeoff.

The new feature in Navtech’s Landing Distance Calculation (LDC) now automatically calculates the performance weight on the longest runway in zero wind. If this weight is limiting, the LDC then advises the Norwegian crew. Additionally, it will further advise the crew about the limiting weight on the runway most likely to be assigned, in case the crew elects to use the exemption in OPS 1.515 (d).

In the test case illustrated above (click here to open a larger screen shot in a new window), Navtech’s LDC has automatically calculated the limiting weight to be 62.5 tons and advised the crew that the most favorable runway (MFAV) is limiting (in this case RWY 07). The weight in brackets (65.2 tons) will be maximum landing weight on RWY 25, with wind being considered.

Also, by looking at the Advisory Information panel (bottom left), the crew will see the advisory landing distances (in this slippery case, all factored by 1.15). This is very useful information to help the crew decide whether it is operationally wise (even if legal) to land or divert. This is particularly helpful as a time saver, especially when flying into short, challenging airports, or if you have a non-normal situation. It is also easy to update weather information for inflight assessment of the landing conditions. Norwegian is very satisfied that they now can get all this information by doing only one landing calculation prior to takeoff.

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