Surely it doesn’t matter which way up the phone is orientated provided it’s held in a fixed position and Calibrated in that location so you have your reference point.

As I understand it from the documentation on the iPhone (as an example), the Core Motion data from the 3-axis accelerometers and gyroscopes show any changes in orientation through the API. Otherwise all those driving games that require you to drive the car by tilting the phone would only work if it was upright.

I mount my phone to the mast in a Lifeproof Case and I’d suggest that for most dinghies it wouldn’t be possible to mount the phone horizontally in the centre of the boat – unless you want to risk standing on it!

Hi Christopher.

You will get some pitch and yaw data since that is recorded relative to the position of the device when you “calibrate” it  – but if the phone/tablet is not mounted in the mid-line of the boat, the data may be skewed.

An alternative may be to run RaceQs on a phone which you can put out of the way below (next to the keel for example) for tracking and use your tablet for the race software such as iRegatta which is more optimised for tablet displays and easier to read in sunlight.

Regards

Paul