Hi Ian,

I don't own a Seawolf but I think you got it right the first time, as the front dive planes are tilted downwards and the back are down as well, the read gets pushed up due to the position of the stern planes and the front tilts down due to dive angle of the front planes, like this:

/--------------\

And of course, to surface, the planes are tilted like so:

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....Or simply release the throttle stick and let buoyancy do the work!