The Unforgiving60
The Unforgiving60
Ben Pronk, DSC & Tim Curtis
S5E17- Ashley Semmens: The Clearance Diver who is finning the English Channel
1 hour 8 minutes Posted May 31, 2025 at 4:55 am.
– Ben and Tim intro the episode and Ash’s unique goal: finning across the English Channel01:14 – Comparison to Sam Penny’s Channel swim (Season 1, Episode 27)01:40 – Ash’s clearance diving background and fear of water after trauma02:45 – Military and Afghanistan service; PTSD and recovery journey04:00 – Ash joins the conversation, starts with early life and growing up in Adelaide06:00 – Competitive swimming as a teen; early struggles and successes07:45 – 2003: Racing against Grant Hackett at Nationals09:18 – Backstroke vs freestyle debate; Ash’s short course gold medal (with caveats)10:00 – Natural transition to the Navy from competitive sport11:01 – Joining as a direct entry diver and diver vs boatswain's mate decision12:01 – Clearance Diver selection process explained — 10 days of being wet, sandy, and psychologically tested14:07 – What Ash learned about focus, fatigue, and resilience during selection15:00 – 2009 shark attack incident: Ash explains what happened to Paul de Gelder17:34 – Ash’s role in the aftermath: trauma from cleaning the boat, psychological impact18:29 – Lingering fear of large bodies of water, even lakes20:00 – Later incident at Jervis Bay: panic before dive leads to difficult team moment21:12 – Realisation of responsibility and shame around not seeking help22:30 – Stigma and lack of psychological support during service23:45 – What clearance divers do: diving, EOD, underwater repair, and land-based ops25:16 – How Ash ended up doing EOD work in Afghanistan despite being too junior27:22 – Becoming the most junior sailor to deploy for combat operations in Afghanistan28:46 – Motivation to deploy: “It’s like a footballer wanting to play a grand final”29:00 – Getting targeted by an IED during deployment
About the Bushmaster
Pressure builds up
PTSD, cracks, symptoms and care
‘More to live for’ – side story
Medical discharge… and there are no protective factors in the military uniform
Role identity fusion
Finning the channelbreaking it down
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1:08:48
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Show notes
Ashley Semmens is a former Royal Australian Navy Clearance Diver who served for 18 years, specialising in explosive ordnance disposal. He has deployed multiple times, including to Afghanistan, and participated in Australia's military withdrawal in 2021. After surviving trauma from an IED attack, a sniper incident, and a horrific shark attack aftermath in Sydney Harbour, Ashley was medically discharged due to PTSD. Now, he's preparing to swim the English Channel — not just any swim, but on his back, using fins. It's a fundraising mission for the Navy Clearance Diver Trust and a deeply personal journey into fear, resilience, and purpose.
In this episode, Ash opens up about overcoming fear of the water, losing close mates, post-service mental health, and how he’s turning pain into a platform for support and recovery.
Key Moments
 
 
External Links
Navy Clearance Diver Trust
Paul de Gelder – Shark Attack Survivor & Advocate
S1E27 – Sam Penny swims the English Channel
Contact Us
www.unforgiving60.comEmail: [email protected] & Twitter: @Unforgiving60
 
Music
With thanks to: The Externals – available on Spotify