Which phrase correctly introduces your own vessel identity in a routine voice call?
Short answer
This is
Use 'this is' between the called station and your own vessel identity. The other phrases belong to distress relay, safety or distress-traffic control, not an ordinary routine opening.
Sources and scope
Reviewed by Richard Moore on . This answer is scoped to united kingdom marine vhf and internationally harmonised procedure; check the current chart, publication, local rules and official operational guidance before acting afloat.
Quick check
Which phrase correctly introduces your own vessel identity in a routine voice call?