M_Boats: Securing the mast to the trailer

Hello all, As I have had my fourth sail on my boat I have noticed there is one thing really slowing me down at boat launch and retrieval. I haven't found an easy and safe way to secure the mast to the trailer during transit. I am generally on the safe side and over do things but tying the mast to the trailer with rope just takes way to much time. Has anyone come up with a faster and probably more secure way of accomplishing this task? I was thinking of rigging up something where I could use a ratchet tie down but I thought I'd ask what other people do for this necessary task. -Ted