With that being said and I have never played Traveller using HG rules and Guidelines...
The quote above explains you utter incomprehension regarding HG2, an incomprehension which is neatly illustrated by what you wrote here:
But that Battleship you design is only equipt with 16 inch naval guns.
The weapons aboard the large warships designed with HG2 fall into three categories. There are spinal mounts which are the functional equivalent to the main batteries. Next are bay weapons which are the functional equivalent of secondary batteries. Finally are turrets which are the functional equivalent of AA or small caliber weapons.
If you're going to write opinions about HG2 it would be very helpful if you were actually aware of what is in HG2.
But as pointed out in the Bismark example, there is the possiblity of a warship being taken out by warship or craft one tech level below the average.
Complete rubbish. Seriously, you should do some actual reading on that subject rather than just repeating
History Channel nonsense. Your "example" is so laughable that the point you're trying to make is completely overshadowed.
The Fleet Air Arm's Swordfish biplane was an obsolescent platform but the
torpedo those planes dropped were among the finest available at that time in WW2. While other powers had better specific examples for specific uses, the full range of torpedoes used by the RN throughout the war were the best.
The Swordfish were also finally able to damage
Bismarck with a single torpedo at literally the last moment thanks to blind luck on the RN's part and poor preparedness/design on the KM's part. First, after failing to hit
Bismarck during several earlier strikes, the planes from
Ark Royal scored a single hit first because a lucky accident revealed the magnetic pistol detonators were faulty while there was still enough time to rearm the aircraft. Second, poor design left
Bismarck with a uniquely vulnerable stern and
two separate AA systems covering different parts of the ship. Third, the crew aboard
Bismarck had not been trained sufficiently in AA operations.
What I am trying to point out here is superior firepower maybe great against your enemy in a wargaming scenario but in an actual real world scenario those ships design around the huge guns are fatally flawed because they don't take into account the smaller ships designed around the same weapon system.
What you need to realize is that HG2 designs are not what you believe them to be. Riders do not carry a spinal mount and nothing else. Read the book first and then share you opinions with us.
HG2 factors agility into the combat question, something you'd know if you'd ever read it.
Then there comes the simple fact that weapon designed to fire at long and medium ranges don't do well against ships at close range.
HG2 penalizes different weapons at different ranges, something else you'd know if you'd ever read it.
Orr is right Battleship in Traveller are better than Battleriders because that is the way the game was designed to react.
WRONG.
ONCE AGAIN, HG2 inclusion of tech levels means that
different types of vessels are better at
different tech levels. At lower levels fighters routinely mission kill ships while at the higher levels ships can ignore fighters altogether. As tech levels change, the "solution" changes just as has occurred in history.
Do you want a wargaming scenario or a real world scenario in Traveller?
Seeing as you have no idea of what HG2 is actually about and seeing that your real world examples are nothing more than repeated
History Channel fluff, your "question" is entirely moot.
Read HG2 and get back to us.