Remote serial monitor access

Hi I hope someone is able to help me. I am creating a 360 ultrasonic sensor to be uses at sea and I am trying to retriever the distance date through the serial monitor without my laptop having to be physically connected . I am using and Mega 2560 board. I was wondering if anyone could advise the best way to do this.

Depending on what you need to do at sea I suggest uploading the code and then using a 9 volt battery attachement, however I am not familiar with the "Mega 2560 Board".
If there is anything special or different about this board let me know.

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