They are members of the amateur radio organisation [New Zealand Association of Radio Transmitters Inc] skilled in radio operation procedures and knowledgeable on the deployment of radio communications and whose members form the Amateur Radio Emergency Core or AREC.
The AREC was born out of the amateur radio fraternity in 1932 after the Napier earthquake. Its mission was to train radio operators in providing reliable message handling over the length of New Zealand for any type of emergency.
Their members come from all active clubs throughout New Zealand and answer callouts as and when required no matter the time or day.
Kāpiti is well represented by such dedicated people drawn from the very active Kapiti Amateur Radio Society, which is now a charity.
These people not only provide communications for Land SAR but they are also operate the Civil Defence radio network on behalf of the Kāpiti Coast District Council on a regular basis ensuring communications are operational when needed.
Another function they serve is to operate the WandaTrak beacon location radio available to Kāpiti residents. This is a voice for those who can't call out in response to searchers.
WandaTrak is an electronic beacon carried by people with disabilities such as autism, dementia, and Alzheimer's. These people might wander away from their place of residence, be it a private home or a retirement home.
When they are reported missing local dedicated amateurs get called out by the police to assist police in locating the missing person so they can be returned to their place of residence.
Amateurs are a trained pool of experience radio operators vital to communications in troubled times.
A question that regularly arises is why are amateur radio people called hams?
I refer you to the origin on the following website as the interesting story is too long to tell here.
Briefly it was the surname initials of the people who set up the first ham radio station at Harvard. They were Albert S Hyman, Bob Almy, Poogie Murray.
The term ham was the term used in the congressional committee hearing about licensing to differentiate it from commercial radio licensees.
https://www.rfcafe.com/references/electrical/origin-of-ham.htm