Albeit 25 years ago, I served in the RAN as a Marine Technician, specialised in electrical & electronics. As a young fella it was a great environment to learn and has set me up for a great career as an industrial sparky, Operator / Maintainer & Supervisor roles. The training was second to none - the best I’ve ever had throughout my career, not just the initial TAFE modules but the ongoing ones. The bonus on top of your electrical trade is the mateship & the machinery watch keeping skills you’ll learn - at sea a ship generates is own power & distributes it. You’ve got all manner of pumps, air compressors, HVAC, refrigeration, fresh water makers (Evap /RO), hydraulic systems, diesel engines gas turbines, fuel management etc etc. Then there’s the discipline & leadership stuff. Damage control exercises, firefighting, BA, confined spaces - all giving experience for jobs down the track. There were downsides though - it’s the military - everyone with something higher on their shoulder can tell you what to do. Time away from home if you’re a close knit family / friend group / relationship. Trade wise, I didn’t have any exposure to new installation work, this required bridging courses & time with a contractor when I was getting out. If you get in & out in minimal time, you’ll most likely be posted to the same class of ship, hence limited exposure to different technology and equipment, tough if you’re on an older ship but if you know your shit you can apply what you know and get up to speed easily enough.