You have to reach DOCK from SHIP in the minimum number of tries with the following rules.
You are only allowed to change one letter at a time. You have to keep the word length the same.
At each step of the way, you must have a legitimate English word. Thus, something like going from "SHIP" to "DHIP" is not a valid step, but from "SHIP" to “SHOP” is valid.
As long as the origin of the word is provided, it can be accepted. To avoid disputes, please stick to well known words.
For example: How do you go from S A N E to H A N D ?
Answer: S A N E → S A N D (1) → H A N D (2).
Done in 2 steps, all real words.