The Mystery of the Flying Machines at Seti I Temple - Abydos - Egypt

At Seti I temple, in the hypostyle hall, there’s a lintel on which appear four flying machines: a helicopter, a submarine, a flying saucer and an airplane. What’s the hidden mystery behind these machines? Were there an advanced technology in Ancient Egypt? I disabled the comments area because 90% of them are impolite (bad language, insults, etc..). I just don’t understand why someone can’t express (him/her)self politely? Sorry for that.