5 Describe the takeoff splay for straight and curved departures:
According to PANS-OPS a turning departure is one in which a turn is initiated wich alters the course by > 15 degrees.
The splay is a bit difficult to describe but I'll do my best. Best is to look at a picture (there's probably a good one in your airlaw book if you have one). The splay is in my underestanding the angle by which a specific area expands. On a VOR route for example, the splay increases, then decreases. All takeoff areas are measured from the departure end of runway (DER).
Splay for a straight departure is with no trackguidance: At DER 150 m to each side of centre line. This takes you into whats known as AREA 1 which extends 1.9 NM straight ahead. The angle by which the area expands is 15 degrees to each side measured from a parallel to the centreline. There is no AREA 2 designated for a non trackguidance departure.
Splay for a straight departure with trackguidance: AREA 1 is as before, but now there's an AREA 2. This starts after 1.9 NM from DER. Depending on if trackguidance is a VOR or NDB the area will decreas towards the aid by 7.8 or 10.3 degrees respectivly, measured from a parallel to the centreline. On passing the aid, the area will expand by the same figures. The area continues past the aid for another 2 NM if its a VOR and another 2.5 NM if it's an NDB.
For a turning departure AREA 1 is as before. AREA 2 will be affected by how great a course change the departure is designed with. Say that a turn of 30 degrees to the right is initiated some way into AREA 2. The left side splay will continue as in AREA 1 for a length depending on fix tolerance and flight technical tolerance, thereafter it will make a right 30 degree turn. On completion of this curve it increases by 15 degrees relative to a parallel to the new centreline. The fix and flight technical tolerance is basiacally a safety factor for ensuring the aircraft is overhead the turning fix and a safetyfactor to permit the aircraft to initiate the turn. The right splay will increase by 15 dergees measured from the new centreline until intersecting with the trackguidance splay which is as before: some form of fix on the centreline from which an obstacle clearance area is calculated. Splay is as before VOR 7.8 and NDB 10.3 degrees.
For an omnidirectional departure AREA 1 is as before. AREA 2 boudries will increase by 30 degrees relative to a parallel to the centreline.
I realise now that this explanation got a bit out of hand but I hope you were able to follow me. A summary:
The splay in AREA 1 is allways 15 degrees.
The splay in AREA 2 for a straight departure is - 7.8 VOR and -10.3 NDB. Past the fix the splay becomes positive.
The splay for a turning departure is nearly the same except for the fix and flight technical tolerance, after which the outside boundry turns by the same amount as the centreline and thereafter expands by 15 degrees outward until intersecting with the fix splay as in AREA 2 straight departure. Naturally, the splay is calculated to the sides of the trackguidance aid and not directly overhead. The width of this part I tend to forget and is not really relevant to your question.
regards/LnS