Ollie William Johansen - anyone have any info?

Hi all First time on here, I'm trying to find any information on my Great Grandfather Ollie Johansen. Here's what I have so far... Ole William Johansen, born in Fredrikstad, Norway to a sea captain John Johansen (wife Emma Johansen, maiden name Andersen), followed a maritime career, worked out of U.S. Pacific ports, and arrived in New Zealand as a seaman between ~1917–1920, where he most likely jumped ship and settled, possibly in Napier before marrying Ruby Simmonds in Wellington in 1921. I thought I might find the name of his ship. Any information greatly appreciated.