It was a really good session last night on Navigation with a good introduction to the subject and chance to have a go at a map exercise.

Some people have asked about the flight computer (often called the whizz-wheel) which is the circular slide-rule we use to quickly work out the effect of wind on our intended track.

If you are just looking to fly at PPL level, you are fine with a CRP-1, or equivalent. We would say it is better to go for the CRP-1 than others on the market as it is universally known, compatible with the training books and is well known to instructors and examiners all over the country. They are about £45 new.

If you are looking to go beyond PPL to commercial or instructor level then you will need the better flight computer which is larger with more features designed for the ATPL written exams. This is the CRP-5. Almost every commercial pilot has got one or had one in the past and the only drawback is that a new CRP-5 is £85 or so.

The good news is that they are usually available on e-bay or elsewhere on the web at around £35-£40.