| What is the action that a GMDSS Radio Operator should take when a DSC Distress alert is received? |
| A) No action is necessary, as the DSC control unit will automatically switch to the NBDP follow-on communications frequency. |
| B) The Operator should immediately set continuous watch on the radiotelephone frequency that is associated with frequency band on which the Distress alert was received. |
| C) The Operator should immediately set continuous watch on VHF channel 70. |
| D) The Operator should immediately set continuous watch on the NBDP frequency that is associated with frequency band on which the Distress alert was received. |
