When turning off lighthouses ("visa navutrustning" in the Swedish localization) not only the lighthouse sector lines disappear, but also the lighthouses themselves. Since lighthouses are helpful for daytime navigation it would be nice if the lighthouses remain visible when turning off sector lines.
I realize now that the navaid switch turns off all kinds of navigation aids, not just lighthouses.
Instead I suggest a new setting to turn off sector lines and sector circles since they clog up the display in areas with many lighthouses. Sector lines and circles are of limited interest for daylight navigation.
For an example have a look at 57°39.7N 11°43.7E at scale 1:200K.
I will add the ability to turn OFF the sectors in iNavX 3.2.9