Hi all,
I'm writing a decopunk fantasy novel and I'm basing a plane in it on the SEV-3, mainly because it looks cool. I am ignorant of how these planes work, but luckily, I've been able to read a bit about them online. I do have a question I can't seem to find an answer for, however. The SEV-3 has two tandem cockpits, one forward one for the pilot and one behind for two passengers. Can the pilot communicate with the passengers while they are in the air? If so, how?

If not, what could I alter in the design to allow for communication? This is a fantasy novel, after all, so there's leeway.

Thanks in advance for any answers!