Re: your request for Navy expertise. The following is clear the SEAL team members are for possibel counter Tango action aboard this vessel. The radiation specialists from Groton are to determine what exactly the radioactive material is and how configured one may presume the NEST people are to disarm any device that could detonate. For what it is worth one may presume the best of the best are dealing with this ship and those aboard.
Stay well - Stay safe - stay armed - Yorktown