Go to the “Themes” menu box and select the “Inspire Overview” dropdown menu. Go to to display a screen like that below: UKHO INSPIRE portal main screen Use at your own risk! How to download UKHO survey data This has little bearing on their usefulness for fishing, but obviously means that you must not rely on them for navigation (there may also be other errors in addition to those identified to date).
The AT5 and other charts produced by this method are not quality assured in the same way as a full chart and do not contain information such as tidal streams or other navigational information. Instructions on how to do this are included at the end of this guide. To generate an AT5 chart you will need to download an additional (free) piece of software from Lowrance/Navico – Insight Map Creator.
All of this increases your opportunity to access detailed information for your area. I notice also that an increasing number of surveys are available and UKHO appear to be publishing more of their “back” catalogue, with data from the 1990s appearing alongside new work. Reefmaster has now been updated to allow direct import of UKHO surveys, which saves the considerable hassle of conversion from Cartesian to lat/long coordinates. – Load the AT5 chart and display it on a chartplotter – Export the chart from Reefmaster into an AT5 file usable by a Lowrance chartplotter – Downloading the UKHO survey data covering the Sound of Mull This “how to” works its way through the following steps: Whilst it’s not entirely straightforward, by expending some time and effort you can create extremely detailed charts for roughly the same cost as a Navionics card (or the price of a half-decent fishing rod). Likewise the information isn’t just of use for Lowrance kit, although it does tend to lend itself to this type of work.
A series of large sandbanks show clearly in Reefmaster, but are unrecognisable in many other electronic chartsįor this example I’ve chosen the Sound of Mull (and specifically the Lochaline area), but data is available for many other regions as well. Before using the result read the warnings, and understand that the result is not suitable for navigation. The aim of this page is to walk through the production of a chart suitable for use in a Lowrance chartplotter, based on freely available and very detailed UKHO data (see this post for more information), coupled with the excellent Reefmaster software.
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