What's in the name
HMAS Otama was one of two Oberon-class submarines the Royal Australian Navy fitted out as specialists — the "mystery boats". A station whose whole purpose is to hear faint things from a long way away could hardly ask for a better namesake. And like the boat, when it does come up to deliver, it delivers.
The Oberons were diesel-electric boats: slow on the surface, quiet underneath, and able to sit still for a very long time. That last quality is what made them useful. Otama and one sister were fitted with additional surveillance and intelligence-gathering equipment, which is why they were known within the navy as the mystery boats.
What is on the public record is that she was routinely deployed on classified operations gathering intelligence on Soviet Pacific Fleet and Chinese Navy vessels, and on associated coastal surveillance through Asia. The detail of those patrols is not public, and nothing on this page attempts to fill that in — everything here comes from the published record.
She was part of the RAN's largest flag-showing cruise in the Indian Ocean in 1980, and went through a long refit between 1983 and 1985. She stayed in service until late 2000 — past her intended retirement, because the Collins-class boats meant to replace her were having a difficult birth. The old submarine covered for the new one.
In August 1987 two submariners died when Otama submerged while they were still working in the fin.
That belongs on any honest page about this boat. It is the part of the record that is not about capability or cold war intrigue, and it is the part worth pausing on.
She was sold in 2001 to the Western Port Oberon Association, which intended to preserve her as the centrepiece of a proposed Victorian Maritime Centre. It never happened. Submissions to site the museum around the Mornington Peninsula were knocked back repeatedly. She was listed on eBay in 2008 and did not sell. In-principle approval for a site at Hastings came in 2013, but the planning permits never followed.
In September 2022 she arrived in Western Australia to be broken up, every attempt to save her having failed. A boat that spent her career being difficult to find ended up somewhere no one could quite decide what to do with.
I should be straight about the connection, because it is a modest one. I am ex-Navy — an ETC3, an electronics technician — and this station takes its name and its inspiration from what an ex-Navy technician can still do with a soldering iron, a quiet paddock and a reasonable amount of stubbornness.
I was never a submariner. I went aboard an Oberon once, alongside at Fleet Base East, and at six foot four I worked out inside about ninety seconds that it was not the place for me. I have often wished I had found some way to make it work anyway. Hot bunking was probably never going to be my thing either. But the missions those boats did were genuinely remarkable, and the work was as interesting as anything in the fleet.
So the dolphins on this site are borrowed, and knowingly so. They belong to people who did fit, and who stayed down there for weeks at a time doing the job this station only plays at.
Because the job is the same, scaled down and made harmless. This station will sit still in a quiet place and listen to faint signals from a long way off, and its value will come from where it is rather than from what it costs. Mostly it listens.
But the Aurora 510 is a 500 watt transceiver, and that is the other half of the parallel. IKARA and ALAMO run a hundred watts and get by on patience and a quiet site. This one will spend most of its life receiving — and then, when it opens up into nine bands of DX Commander from somewhere with no noise floor to fight, it lands with considerable weight. It is the big gun of the three. A boat that hid for weeks and then made itself unambiguously felt is not a bad model for that.
The naming follows the same habit as the others. IKARA takes its name from an Australian naval anti-submarine missile; ALAMO from where it stands in Texas. This one is named for a boat that was good at the one thing the station exists to do.
For the record, the 1 Zulu and VK1HF marketing
departments played rock–paper–scissors over
otama.vk1hf.com and mk48.vk1hf.com. Otama won.
Naming a listening post after the torpedo rather than the boat would have
been saying the quiet part rather loudly.
Everything above is drawn from the public record of the ship — commissioning and decommissioning dates, the published description of her role, and the reporting of her fate. Where the record stops, so does this page.
This site is built and run by Ian Gilchrist, VK1HF, in Canberra — of 1ZULU.com.au, creator of the RS1 framework. If you have a correction, a memory of the boat, a quiet paddock, or you just want to talk about any of it — ian@iangilchrist.net.
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