Gerry Anderson was infamous for never letting realism get in the way of a plot.
The "spacecraft/aircraft colliding while one taking is off and one landing" bit also appears in some of his other works. There was a sequence in _Fireball XL5_ with someone directing several simultaneous launches and landings to the same pad.
The puppeteers were also notoriously uncaring about continuity.
One of my "favorite" examples: There's one episode of _Thunderbirds_ which involves a covert military organization in North Africa which shoots down _Thunderbird 1_ to preserve the secret location of their base. Leaving aside the fact that if they hadn't shot nobody would have noticed them, in the scenes where some Egyptologists find the crashed _Thunderbird 1_, the model used is the smaller one, with the pilot barely fitting into the nose.
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The "spacecraft/aircraft colliding while one taking is off and one landing" bit also appears in some of his other works. There was a sequence in _Fireball XL5_ with someone directing several simultaneous launches and landings to the same pad.
The puppeteers were also notoriously uncaring about continuity.
One of my "favorite" examples: There's one episode of _Thunderbirds_ which involves a covert military organization in North Africa which shoots down _Thunderbird 1_ to preserve the secret location of their base. Leaving aside the fact that if they hadn't shot nobody would have noticed them, in the scenes where some Egyptologists find the crashed _Thunderbird 1_, the model used is the smaller one, with the pilot barely fitting into the nose.