So here's the deal: the hours in my logbook are based on VDO hours. However, I've just spent some time flying a plane with no VDO meter. I realise I should/could have just used a watch to work out my time, but I managed to not remember to do that every time I flew! So, what is the best/approved/correct way to record such flying time in one's logbook? The few ideas I've had are:
- Use tacho time
- Estimate VDO time based on a multiple of tacho
- Estimate VDO time based on the small proportion of flights where I remembered to time myself and multiply by a suitable factor to compensate for the other flights
I'm really a bit unsure here, so any helpful advice would be great.