Mario,
That is a 3 degree slope with a rate of descent of 175ft/min (using the North Sea mean deck height of 98ft plus 50ft); at 500ft, 30kts in still wind, you will be at the back-side of the drag curve with a difficult sight picture (the deck almost looks flat at 3 degrees).
Try doubling your approach angle.
Not sure what is wrong with the normal sight picture approach; keeping a constant speed will always start the procedure too slow and could end it too fast.
Jim
Last edited by JimL; 9th Apr 2009 at 13:22.