The C-802 is comparable in size to a cruise missile, couldn’t launch from a patrol boat.
Rather than C-802 missiles supplied by Iran, they are more likely to be C-801 missiles and their launchers scavenged off three Type 021 missile boats by defectors from the former Yemen Navy.
The Houthi militia just doesnt have the trained crews that could arm, aim and fire these missiles. More likely they are defectors loyal to former Yemeni President Ali Abdullah Saleh.
The C-801 is a reverse engineered Exocet. They would both be truck launched.