About this site
Line of Sight is an independent reference on hobby drones in the United Kingdom: which machine to buy, and what the law asks of you once you own one.
Plainly stated
This site sits at a web address that a different project used years ago. Around 2013 a single product was sold from it: a remote controlled machine that drove along the ground and then took off and flew, funded by a crowdfunding campaign. That product is long gone. Line of Sight is a new and independent reference, is not that project, is not written by or connected to the people behind it or to any later owner of this address, and claims no continuity with either. No former brand name is used here.
What this site does
It explains what separates one class of machine from another, so that the guidance survives the particular models being replaced. Each page defines one thing, says what the numbers on it mean, shows where the same choice is the wrong one, and sends you to the page that answers the question you will have next.
What this site does not do
It sells nothing. There is no cart, no checkout, no basket and no affiliate link anywhere on it, and no price here is a current price for a named product. It recommends no manufacturer and no model, because a model is replaced every eighteen months and a page that names one is an advertisement within a year of being wrong. It gives no legal advice: the rules pages describe what the requirements are about and never rule on a particular case. And it has nothing to say about military unmanned aircraft, which are a different subject that happens to share a word.
Where the rules come from
The Civil Aviation Authority is the body that publishes the requirements for flying an unmanned aircraft in the United Kingdom. Those requirements change. Where this site states a figure that has legal force, such as the weight at which the class boundary sits or the height ceiling, it says so and it names the CAA as the source to check. Everything else on the rules pages is description, written to help you understand what you are reading when you go and read the real thing.
How the pictures are made
Most of the illustrations are photographs, treated in the site's own inks so that a photograph and a drawing read as one sheet, because most of the subjects here are objects and a photograph of an object beats a drawing of it. Sixteen pages carry drawn chart plates instead, and those are the pages whose subject is a rule, a boundary or a scale. You cannot photograph a height ceiling, and a stock photograph of somebody looking at a drone beside a page about registration is decoration pretending to be information.