This tech (mondernized) is still in use!

Here is an SSTV image I received as part of an image exchange with another amateur radio operator; I was in New Mexico and they were in Illinois:

The “P5” is the image equivalent to a signal report.

Depending on the encoding method, it can take some time to transmit the image, as each line is sent sequentially.

Could this be potentially be useful in the early spacefaring age when we’d (presumably) have to be judicious with bandwidth?