"Yes, but not applicable for the rover. David Boulanger said:
So a Loiter " flight mode " does not exist yet?"

"Hi,
You can program it just into a mission, not with the remote switch mode.
Select the WP target where you want to do the loiter and choose the correct loiter mode "loiter time" or "loiter unlimited"
If you choose "loiter time", you need to write…"

"Hi,
Be carreful, i don't use this capacitor for "replace" the battery voltage during the disconnection/connection!
It's just for switch off the PixHawk (and so the IMU) slowly when you disconnect, definitely or not, the battery.
This capacitor is…"

"The very easiest solution (that working for me) simply consist to solder an external maxi capacitor (0,1F - 5,5V)between the positiv and negative pinout or cable of the power supply (board side, not battery side).
You can take this type of…"

"I'm agree with this vision.
Go step by step with a first firmware version without external sensors, just the GPS and compass.
Then, why not adding wind/current sensor in next version for optimising and reduce the USV drift.
But i'm convinced that…"

"David,
I was thinking of an automatic Rally point generated at the boat position, when this one switches to RTL mode in case of failsafe.
Regards,"

"Grant, just my vision for the RTL mode on sea:
When the boat go in RTL mode (by failsafe or by remote action), there are two possibility for the boat:
-If the Rally point exist, it's going to the nearest rally point and waits in loiter mode.
-If the…"

"Hi,
What do you think also of a possibility to RTL to home position by the same previous way?
On sea you can have many obstacles (buoy, boat, jetty and so) preventing a direct RTL to home position.
Regarding the rally point, RTL to the nearest, seem…"

"Hi Dmitry,
I have the same issue with a Droppix board (the french Pixwhak like's).
Normaly, my Droppix is powered by the "power module" and by the ESC via the receiver and the pwm/ppm conveter. In this configuration, it's working perfetly.
The last…"

"I thinks it's a very good idea to create an "arduboat" firmware with a dynamic positionnig mode!
But, perhaps that the boat's user community is too small for the moment, no???"

"Hi,
One think very important in boat configuration, you need to start the system on shore or if is it impossible, you need to disable the gyro autocalibration at startup.
Because in water, the boat alway moving and the gyro is not able to make a…"

"Ok Grant, priority to rovers users.
Do you think is it possible, in futur, to have a specific arduboat firmware/developpment?

Regards,"

"Hi Grant,
Regarding this loitering mode for rover, is it active mode (drift compensation) or just passive mode (stop motors and do nothing)?
Is it for boat application... :)"

"Hi Seppo,
I receive my RFD868+ bundle.
But when i'm connecting the modem with RFDtools 1.5, i can't see and change the 868Mhz frequency, i have only the choice between the 902/928Mhz band.
Is there an hardware frequency band error with these modems…"