This cruise was operated by Noble Caledonia who have chartered the ship for several years from APT who apparently have a share in NC.
It was an expedition cruise along the coast of Java, ending in Singapore. The attraction of these cruises is that there is an emphasis on nature and local culture and they go places larger ships can't get to, with frequent use of zodiacs for landings, many of them "wet" on beaches where there is no dock available. The expedition staff have their specialisations. e.g. history, birds, marine life, geology, and are all trained and skillful zodiac drivers. This is important as the nature of the cruises means the ports of call are more than usually at the mercy of weather, sea state, currents and tides and they did well to find suitable landing spots and get everyone off and back on the ship in changing conditions. It also means that a reasonable level of fitness and agility is required from the passengers and you have to be prepared for almost anything.