Having just had my offer accepted on a yacht I am keen for some advice on navigation. I have read a lot on here regarding Navionics etc on iPad, can you tell me are you using that in conjunction with a gps? using the gps for coordinates and ipad to plot course, I am just trying to understand how you use them when out of mobile reception range. Cheers.

The first thing to know is that gps and chart plotters do the plotting for you, they don't navigate for you.
They are great and we all use them but it is still critical to have a good knowledge of navigation principles such as heading, speed, track, velocity, drift, variation, deviation, tides, leeway, track made good and how to read a chart. Whether on a plotter or paper, you need to know what it is telling you. Steering to a waypoint on a gps without knowing the basics can put the boat and you and your pax into a lot of danger.
I'd suggest a coastal nav course, it will cover most of these basics and help you avoid a lot of problems. They aren't expensive in the big scheme of things.

In an earlier thread I asked the question whether the Navionics on an iphone/ipad ap needed to be within the range of a mobile network and received many helpful responses. The answer is no as the iphone has its own gps and the ap locates you independently of the mobile network. If you search through the previous threads you can read the advice of many experienced sailors. I used the Navionics ap on my iphone recently on a sail from Gladstone to Sydney and it worked fine at all times and places. Handy when your alone on deck and want a quick check of position.