As well as up to 12 permanent crew, the ship sails with a diverse "mixability" group of 40, half of whom may be physically disabled.
"[They] come together to crew on equal terms," Mr Green said.
The ship was completed in England in 2000 to cater for those with disabilities, complete with wheelchair lifts, widened passageways, visual alarms to aid the hearing impaired, tactile markers to help the visually impaired find their way around, signage and diagrams in Braille.
Below deck is a sick bay, widened galley, and two messes. There are also two different types of accommodation - as well as dormitory-style bunks, there are eight bunks for wheelchair users, complete with winches to assist them getting into bed.
Together, the crew perform various duties to keep the vessel ship-shape, from taking watch, helping in the galley, or assisting in setting sail.
Those aboard can even steer the ship - the seat at the helm can be moved depending on the skipper's ability, with power-assisted steering for the ship's wheel, and a speaking compass so the visually impaired can be told the ships bearing.
JST's aim of integrating both the able-bodied, and those with disabilities was highlighted yesterday during an assisted climbing session while in Port yesterday, where teams helped belay their crewmates as they climbed the ship's rigging.
The same activity happens simultaneously at the other end of the ship, where crewmates help hoist wheelchair users - like Otis - to a platform halfway up the mast.
This was his third such sailing trip, although the SV Tenacious was both the longest ship he had ever sailed on, and the longest voyage.
Having sailed Hansa Libertys since he was 12, Mr Horne said his favourite thing about this voyage was "just being around people that love sailing as well".
The teamwork on board was also a highlight: "I enjoy working with people, it's probably one of my favourite things".
His crewmates include both novices, and experienced sailors. Crew can also range in age from teenagers, to their 80s or 90s.
The experience was open to everyone, Mr Green said. Although most disabilities of those aboard were physical, anybody who could follow instructions was able to take part.
The youngest on board was 16-year-old Scott Rozenberg, from Wellington. It was his first time on the ship, but he said he hoped it wouldn't be the last.
His favourite part of the voyage so far had been "going aloft", by climbing rigging at the rear of the ship. He said he had also enjoyed being involved in keeping watch.
The ship set sail yesterday, bound for Auckland.
It is captained by Simon Catterson, who has been involved with JST for the past 17 years and first came on board the Tenacious just three months after it started.
In his time on the ship, the captain said there were a range of things people took from the voyage - the main one being how to help others, and making friends who remained with them for years.
Napier Port had waived all the usual berthing fees for the SV Tenacious.
The JST also operates the smaller SV Lord Nelson, built in 1986 and which visited Napier twice in November-December 2013, during a year-long global circumnavigation.
The Jubilee Sailing Trust, now being established in New Zealand, was founded in England in 1978 and is based in Southampton. Each year it takes about 2000 adults to sea.
