Mission to test DAT message acknowledgement. Missing standard envelopes -- lab use only. This script can take two roles, Sender==True and Sender==False. In the Sender==True role, the script sends "_.relievedOfDuty" to an acoustic recipient and waits for the ACK. In the Sender==False role, the script monitors for "_.relievedOfDuty" and logs when it is recieved. You must hard-code in the recipient modem address in the SendData element. Maximum length of mission 30 Whether this vehicle should send the original message or simply acknowledge it. 1 Mission variable (don't change). An ACK flag with a timestamp used to detect when new ACK signals have arrived. Mission variable (don't change). Whether the relief vehicle has showed up and communicated its intent to relieve this sampling vehicle. 0 A True boolean, defined as an arg because you can't directly place values in a call to SendData. Recieved relievedOfDuty transmission from relief vehicle. Recieved ACK. Hooray! Sent _.relievedOfDuty Message. Lights, Camera on at range: . 0.5