EGPWS
Troglo,
about 412 tail low in hover....you still don't know how 139 hovers, right?
First thing when hovering a 139 is to riconsider 412 low tail hovers as "very hight tail hovers"!
EGPWS,
on my recent flight experience on 139 I would sugest everybody performing night unaided flight on mountain terrain to buy one or get pilots well trained to use it.
I had been flying in mountain hems for last two years; it happens after sunset+30' you are on remote hospital pad at 6000ft and have no way to climb over 12.000ft to get the 30 minutes long straight route home due to weather, you must do the circle following valleys 2 miles wide under peaks level with FMS waypoints and get home in very VFR/N trying to mantain no less than 1000ft AGL (no radar control, no AFIS, no Information service, nobody flying there, you're alone).
Doing this it's usefull to have a EGPWS to tell you throught PFD and MFD (primary and multifunction displays) the pattern of the valley you must follow with FMS routing overlay on it.
Of course you alwais had GPS and done the trip around dozen of times maybe with 3000mt VIS and overcast with no moon with the stick on the very go-to line; now with EGPWS things are more easy, less triky: if the ship overruns a turn or turns lazy getting too close to obstacle the system shouts "WARNING, TERRAIN" in your helmet.
Alwais think things can get worse if you follow valleys at too low altitude, where GPS link can fail because of terrain obstruction.
In this case will have EGPWS also failed and if you don't see you are toasted.
I have no experience in overwater flying with 139 and his EGPWS but I think it would be as great as in mountains.
maeroda