The Klingons used photons in TMP...
...But the TMP torpedoes were from a
K't'inga battle cruiser, allowing for the theory of a fundamentally different type of weapon aboard the BoP. Intriguingly, BoPs after ST6 are never seen firing torpedoes again, until ST:GEN where the torps once again are decidedly green, and once again create conspicuously little physical damage against an unshielded target.
I think it is interesting as a little tech hint on Klingon weapons systems because, in context, it seems to leave Kirk with no doubt of what they are being hit with and who is responsible.
Umm, who is responsible should indeed be clear from the context, without requiring any knowledge of the weapons involved.
It's a bit different from, say, ST3 where Kirk immediately associates an invisibility cloak with a Klingon Bird of Prey even though there is no prior hint that Klingons would be the enemy of the day. The same happens in ST6: a certain type of invisibility cloak is immediately associated with a Klingon BoP, without a thought spared for the possibility of it being a Romulan vessel. Perhaps this particular type of cloaking effect is easily identified with this one vessel or at least with this one hostile culture?
I still wonder if Kirk is exclaiming "We're being hit with magnetic pulses!" or something like "We're being hit - quick, activate magnetic pulses!" or "We're being hit - look at that warning light, we're suffering magnetic pulses!"... The hits strike right next to the saucer torpedo tubes, and Spock then reports minor damage to antimatter bottles, presumably those associated with the torpedo arming systems. If these bottles suffered pulsation of their all-important magnetic fields, a big warning light should indeed be attracting Kirk's immediate attention.
Then again, the idea that the attacker in "Errand of Mercy" was the classic, easily identifiable Klingon BoP is a sensible one: the attacker came out of nowhere (as if emerging from a cloak), fired multiple shots that failed to create physical damage, and then succumbed immediately to the return volley. "Magnetic pulse" could be a very generic name to an EMP-style or EMP-enhanced weapon, since "magnetic" is e.g. used in Trek a lot as a synonym to "gravitic" or "attracting" despite the physical incorrectness...
Klaa's attacks in STV were not
...Yet Klaa failed to create any destruction with his torpedoes. He merely managed to short out Scotty's repairs on the transporters. So if Klaa wanted to destroy but failed, then it would be logical to assume that his weapons, or at least his torpedoes, were incapable of delivering a lethal hit against a "Federation battle cruiser".
I think a better analogy for the BoPs would be towards Subs and U-Boats, rather than the converted merchant ship Commerce raiders tho.
Oh, definitely. But a German WWI or WWII submarine would be a commerce raider, with no appreciable alternate role. British, US and Japanese subs, and to some degree Italian subs, were intended for sinking warships, while German ones were aimed against mercantile targets. The Klingon BoP of the TOS movie era would be a very nice analogy to the Nazi Type VII boat, while the BoP of the ENT era would be its WWI predecessor - technologically very similar, but with improvements and refinements and with more modern weaponry.
Timo Saloniemi