212 / Charron
The EC225 FND picture that 212man posted shows the FND in HSI mode because its flying an ILS. HSI mode is the only appropriate mode to show ILS localiser information. There is also a sector mode (arc mode if you like) on this screen but that is for displaying VOR or Area Nav information, with radar overlay if desired. The fundamental difference is that ILS indications have no concept of range or distance off track, whereas of course VOR and Area Nav indications do.
Don't forget that each pilot has another whole screen devoted to map-type nav display - it can either be configured in rose mode (where you are at the centre of the screen) or in sector (arc) mode where you are at the bottom of the screen. In either case you can have radar overlay on this screen as well, or even EGPWS if you really want it.
I normally fly around with the FND in HSI mode, primarily using it for heading reference only, and with the NAVD in sector mode showing area nav + radar, but that is just personal choice. For instrument approaches it would be something different depending on the approach.
helmetfire - measures are in hand to inform the manufacturer where the problems lie in EGPWS for offshore, and more importantly what the suggested solutions are.