1) The episode where a gas-based life form is on the surface, that envelopes poor Redshirts and ultimately kills them. If they could have seen it coming, they could have maybe beamed up. Or ran away.
They did see it coming: three-man patrols covered 360 degrees of vision (although why they didn't look
up for a cloud beats me), and when the cloud did attack, one of the three saw it approaching the other two. He just hesitated with firing, probably chiefly because it's pretty difficult to decide where to aim in a cloud that is attacking your fellow troopers by enveloping them! The terrain certainly offered the cloud enough cover to sneak up to the three-man patrols despite them keeping efficient visual watch.
2) "The Galileo Seven," the episode where Spock, McCoy and a few others are ultimately stranded on the surface of a planet. A Redshirt wandered off and was killed by the monster! What an idiot. They're stranded on a planet ... so they split up?
They had seven people to use, and could spare two for a recce team. The two "wandered off" under Spock's orders in tight formation, seeking high ground so that they could find out what potentially threatening force made the strange noise. And that force struck from the cover of dense mist with a missile weapon. I don't see how the fight could have gone differently with "tactics" being used - although the use of
tricorders would have made a world of difference, had those not been rendered inoperable by the weird Murasaki phenomenon.
How quaint.
Tanks make little sense in the Trek context unless they are flying tanks. Inability to fly would seem to be a crippling handicap in terms of firing angles, mobility and speed of deployment. Especially if the tank is too big to be quickly transported, it must have its own means of rapid motion, which essentially means it becomes a shielded and armed shuttlecraft. Which we have seen in operation in Trek all right.
Don't any planets have planetary shields?
Not
planetwide shields, not unless they are the planets of super-advanced aliens.
Starfleet is capable of shielding individual buildings and installations, and probably has city-sized shields or else the damage from e.g. the Breen raid on Starfleet HQ in the Dominion War would have been much more like the aftermath of a nuclear attack today and much less like the aftermath of a tactical bombing run in 1939. But whenever our heroes encounter planetwide forcefields, cloaking fields or whatever, they gape in awe. Now, a transporter-blocking field was erected over the entire Elba II planetoid in TOS "Whom Gods Destroy", but it was not credited with any weapon-blocking abilities, and in any case Elba might have been a fairly small rock.
In all cases and in all eras, except when the plot really depends on it, you can't beam through shields.
...The fun thing is, there doesn't seem to be a limitation against beaming
out through shields. No mention is made of such in any episode or movie, and beam-outs do occur every now and then without the shields being dropped. Indeed, in the very first episode to introduce the concept of "no beaming through shields", TOS "A Taste of Armageddon", a beam-out through shields is performed without comment!
It seems to be a pretty safe assumption 90% of the time. Safer, actually, if they're using their TAS shield belts.
Agreed that the landing parties virtually never come under attack, and security teams are included in the parties for roles other than the stopping of attacks.
However, the TAS shield belts were transparent to weapons. A phaser on stun was not hindered by them in "Slaver Weapon", and crushing mechanical force was barely being held at bay in "Beyond the Farthest Star" while more concentrated mechanical force in the form of punches and wrestling grips easily penetrated in "Pirates of Orion".
The belt doesn't appear to be the Starfleet equivalent to today's US Army flak jackets - it appears to be the futuristic version of the US Army raincoat!
Timo Saloniemi