In Piloting and General Navigation lecture, page 4 of 5, two links that show how lights appear are not working: composite group flashing, and alternating. All the others are working. As an aside, I have found Wikipedia has a very nice working display of nautical lights at https://en.wikipedia.org/wiki/Light_Characteristic. Also, my Lecture Console Audio control displays only a blue background, nothing more, like pause buttons, etc. It had displayed those things before...now they're gone. Thanks.
I will have our technical staff look into the two lights. Thanks for the heads up.