You need to be literally looking at the drone with your own eyes to comply with "line of sight".
Either you must have your eyes on it all the time, or you are allowed to occasionally look away. Which is it? There is a precise legal definition of how often and how long we are allowed to "occasionally" look away.Making adjustment to settings and the OCCASIONAL glance to compose shots.
In his country the applicable law would be this one:Unless he can show me where the law sates that it is permissible to do as he says, the legal requirement is, as far as I know, that you are supposed to be looking at the drone.
§ 107.31 Visual line of sight aircraft operation.
www.ecfr.gov/current/title-14/chapter-I/subchapter-F/part-107/subpart-B/section-107.31
The pertinent bit is where it says, "must be able to see the unmanned aircraft throughout the entire flight in order to: ... [(1), (2), (3), (4)]"
One could insist that means your eyes must never leave the drone. But then you'd never be able to fulfill all four of these conditions.
In particular, if your eyes must remain on the drone, how would you ever be able to scan the surrounding airspace for other air traffic or hazards and avoid endangering the life or property of others?must be able to see [...] in order to:
(1) Know the unmanned aircraft's location;
(2) Determine the unmanned aircraft's attitude, altitude, and direction of flight;
(3) Observe the airspace for other air traffic or hazards; and
(4) Determine that the unmanned aircraft does not endanger the life or property of another.
The rule therefor cannot mean that you must continuously be looking at the drone all the time, because you must also be able to "occasionally" look away to scan the surrounding sky for hazards.
But exactly how long or often is "occasionally"? That is not specified and is left up to the pilot to decide.
It is the responsibility of the pilot to ensure that (s)he is "able" to perform each of those four required functions. If they are not able, then a visual observer must be used.
[...] looking at the screen for prolonged periods whilst the drone is in flight technically illegal.
Of course there are situations where focusing exclusively on your monitor and never looking up would be dangerous. But there are also many situations where one would be perfectly safe doing so, as long as one is always "able" to look up whenever necessary to ensure all four conditions are safely being met.
Does that mean you can fly your drone outside while you are comfortably soaking in your bathtub indoors, as long as you are "able" to leap out of the tub, dry off, get dressed, and run outside at any time to check on the drone? Um, nope.
Crashing your drone through your neighbour's window is a risk, whether you're flying while watching only your monitor or while watching your drone directly. The consequences are your responsibility either way.I believe that if "push came to shove" and you had a crash that had consequences and had been flying looking at the screen then you have legally broken the law which immediately puts you at a disadvantage.
Everything ultimately falls under the "reckless and negligent" clause of the regulations. If you crash your drone because you didn't know that would happen when you did this, well that's negligence. If you crash your drone because you were taking stupid risks with it, that's reckless.
How do you avoid being reckless or negligent? You could just leave the drone in its box and never fly it. That's safe. Or you practise and experiment as often as possible in a safe location to familiarize yourself with how the thing works. Testing how close you can get to objects, while checking what that looks like on screen compared to directly looking at the drone, is a useful exercise.