Mr Dixson
Here's the info I'm refering to. Came informally 6:th Sep. 2006 to by then our Chiefpilot after quesions raised by linepilots how to interped the text regarding helideck take off.
In step 9 of the vertical take off procedure, when we say "10 to 20° nose down" we mean from the vertical climb attitude (which usually matches the hover attitude). If you are climbing/hovering at 5° nose up, then you will pitch over to 5 - 15° nose down on the attitude indicator.
In step 10 of the vertical take off procedure, when we say "rotate to an attitude of approximately 5° nose up" we mean 5° nose up on the attitude indicator.
Please note that in both of these cases we give you either a range of attitudes or use the word "approximate". The initial nose down attitude in step 9 is intended to get you to Vtoss as soon as comfortably possible. I personally would go closer to 10 - 15° down during the day with good visibility. I might only go to 5° nose down at night or during other times of low visibility. You also have to take passenger comfort into consideration. The 5° nose up in step 10 is just an initial target to get you to Vtoss. The actual climb attitude will be whatever it takes to maintain the correct airspeed. In the off shore oil rig case, since you will have cleared all obstacles immediately after takeoff, you can accelerate directly to 80 kias.
OMP