Strongly disagree as far as findable. Unless it was intentionally disposed of or buried or something crazy it should be findable.
Scattered shards of aluminum and engine components grown over with coral or buried in underwater landslides (common on the Niku reef slope) might be findable theoretically, but not in a practical sense.
Plenty of older artifacts have been found intact under water for longer than that.
Many aircraft have been found in lakes, rivers, and lagoons. Give me an example of an aircraft that has been found in a dynamic underwater environment like the steep, storm-pummeled reef slope at Niku.
Ballard agrees with me on that anyway.
Ballard says, "... it's not the Loch Ness monster, it's not Bigfoot, that plane exists which means I'm going to find it." I'm waiting.
What is the official TIGHAR position on wether or not she had a Morse code key or some other way to send CW?
The airplane originally had two sending keys, one in the navigator's station and one in the cockpit. After Manning quit there was nobody who knew Morse so there was no need for a key. The one in the navigator's station was not reinstalled when the plane was repaired after the Luke Field accident and the one in the cockpit was left in Miami.
She could not send CW using the mic. The airplane had a radio control panel of toggle switches (pictured below) that seems to have been unique to her airplane. It is not described in any of the literature and but its functions are obvious.
Bottom right toggle turns the transmitter on or off.
Top right toggle selects either CW (key) or PHONE (voice).
Top left toggle selects either DAY (6210 kHz) frequency or NITE 3105.
Bottom left toggle REC turns the receiver on or off
The bottom middle toggle is the most interesting. It appears to turn the MIKE (microphone) on or off. Normally that would be done by holding down the push-to-talk button on the mic but the buttons on early mics were stiff and Earhart apparently didn't want to have to hold the button down. If the mic stayed keyed if the MIKE toggle was in the up position it would explain the "hot mic" that allowed Betty to hear the back and forth between Earhart and Noonan.