These are not rumors, these are part of the unmnned regulations under consideration. It is focused on aerials right now with the FAA, but DHS is involved with surface and sub-surface unamnned. These are industry working group, looking at the regs and negotiating with the agencies.
Just as there are ROV operators certs for the working class platforms, that may move to a formal license, which would actually be good for the operators. ROV light/med/heavey, etc. There is the ROV Committee of the MTS for one, IMCA, etc.. This is already in place for the aerials.
Yes, you are correct, it is focused on untethered and line of sight (for surface unmanned), the issue at hand is the definition (size/weight/capability,etc) of what the regulations will govern. That is currently what is being looked at.
There is a void right now, so many agencies are looking to sort it out before it is an issue.
In addition, there is discussion on the tether length before a cert/license is required, and weight /size limits. As a note, any commercial use will require a cert.
Yes, the manufacturers are, and will be involved, as just like the aerials, there will not be grandfather.
Class/weight. License per class, of course training and cert for operators. It will be the same for surface and subsurface as it is for aerial.
As an example, here is the FAA SUAS page:
[FONT=museo_sans]You need to register your aircraft if it weighs between [/FONT][FONT=museo_sans]0.55 lbs.[/FONT][FONT=museo_sans](250 grams) and up to [/FONT][FONT=museo_sans]55 lbs.[/FONT][FONT=museo_sans] (25 kg) and you are not flying under the Special Rule for Model Aircraft.[/FONT]
https://www.faa.gov/uas/getting_started/fly_for_work_business/
https://www.faa.gov/uas/getting_started/fly_for_work_business/becoming_a_pilot/
https://registermyuas.faa.gov/
https://www.faa.gov/uas/getting_started/fly_for_fun/