Re: QCs don't make the law, or decide what is legal
How many ways can there be to write "You are now part of the US Navy officially as well as de facto?
Actually, you could not be more wrong - do you even know the contents of the letter or are you dancing to somebody else's agenda?
For those who are unaware of the purpose of the letter, it is to be opened in the event that the UK has been wiped out in a nuclear attack. The captain (and another officer) is instructed whether to launch on the aggressor, not to launch on the aggressor, or to make his, or her, own mind up. The general consensus is that the letter leaves it up to the captain. Captains, after they have retired, have pretty uniformally indicated that they would not fire their missiles. Presumably they would opt to join the Australian or New Zealand navies on the other side of the world, as they have the range.