//              The following are various 7k messaging scenarios that may be anticipated based on information provided
//              by Patrik Moberg. Notation is (set/get, reply) and [ ] means optional. For example, scenario d)
//              we have: volatile settings ([7500], 7001). This means message 7500 may be used to solicit the volatile 
//              settings via message 7001 or 7001 may be an unsolicited message.
//
//              a)  Setup:
//
//                  Query Config                ->  (7500, 7001)
//                  Set sonar settings          ->  (7503, 7501 | 7502)
//                  Setup trigger scheme        ->  (73xx, TBD)
//                  Query specific settings     ->  TBD
//                  Stop pinging                ->  TBD
//                  
//              b)  Normal survey runtime:
//                  
//                  Set various parameters      ->  (7500, 7501 | 7502)
//                  Start pinging               ->  TBD
//                  Change trigger sequencing   ->  (73xx, TBD)
//                  Query vaious parameters     ->  (7500, 7001)
//                  Monitor alarms status       ->  ([7500], 7051)
//                  Stop pining                 ->  TBD
//                  Shutdown                    ->  (7500, 7051)
//                  
//              c)  General data collection:
//
//                  Raw                         ->  (, 7008)
//                  Beamform data               ->  (, 7008)
//                  Bottom detected bathy       ->  (, 7006)
//                  Snippets                    ->  (, 7008)
//                  SSS Imagery                 ->  (, 7007)
//
//              d)  Misc:
//
//                  Volatile settings           ->  ([7500], 7001)
//                  Config                      ->  ([7500], 7001)
//                  Matched filter              ->  (7500,   7002) + others TBD.
//                  Beam geometry               ->  ([7500], 7004)
//
//              Note: there exists other messages to (e.g., 7000 to 7011) that may result. Above is not necessarily
//              a complete list.
//