And for those not familiar with relativity, in any case of course after traversing 1480 light years the civilization you intend to meet will be at least 1480 years in the future.
If two civilization were to meet the most efficient way of communication might be mediated through an AI. Exchange computer with some clear protocol for communication (probably based on elementary mathematical/physical principles) with an AI capable of conveying the intentions and the cumulative knowledge that you want to share.
If two civilization were to meet the most efficient way of communication might be mediated through an AI. Exchange computer with some clear protocol for communication (probably based on elementary mathematical/physical principles) with an AI capable of conveying the intentions and the cumulative knowledge that you want to share.