Over the years, I've seen the Republic of Singapore Navy (RSN) launch, commission and decommission its ships.
The commissioning ceremony for RSS Chieftain (ex-Royal Swedish Navy HMS Sjöhunden) on 24 August 2002 at Changi Naval Base was special as it was the only time I'd seen a submarine commissioned into service.
I've never been aboard an RSN sub. Operational subs that hosted me were from the US Navy (Los Angeles-class USS Bremerton) and the Royal Australian Navy (Collins-class).
Here's RSS Chieftain on her special day 18 years ago.