You have bought a handheld VHF for your boat. What does holding the SRC primarily prove?
Short answer
That the operator is competent to use marine VHF
The SRC is the operator certificate. It is about the person using marine VHF/VHF DSC, not hull insurance, waterproofing, or marina approval.
Quick check
You have bought a handheld VHF for your boat. What does holding the SRC primarily prove?