The Republic of Singapore Navy (RSN) is set to bolster its maritime capabilities with the addition of two new Invincible-class submarines, slated for delivery in 2034. This move, confirmed by the Ministry of Defence (MINDEF), highlights the nation’s commitment to enhancing its naval strength amidst growing regional maritime challenges.
Growing Submarine Fleet
Defence Minister Dr Ng Eng Hen first announced the acquisition during the Committee of Supply 2025 debate on 3 March 2024. He emphasised that having only four submarines is ‘not optimal’ for effective fleet operations, noting the need for multiple vessels to ensure sustained operational readiness.
Submarines Tailored for Singapore
- Designed specifically for Singapore’s unique operational needs, the Invincible-class submarines are built to navigate shallow and busy tropical waters.
- Each submarine measures 70 metres in length, weighs 2,000 tonnes, and operates with a lean crew of 28 sailors.
- Features include high automation levels, significant payload capacity, and ergonomics tailored for the Asian physique.
Current Fleet Status
The RSN’s existing fleet includes the RSS Invincible and RSS Impeccable, both commissioned in September 2024, which have already commenced their operations in local waters. Furthermore, the trials for the third and fourth submarines, named Illustrious and Inimitable, are progressing positively in Germany, with an expected return to Singapore by 2028.
A Strategic Decision
As regional defence landscapes evolve, the acquisition of the new submarines is part of Singapore’s broader strategy to ensure the safety and security of its sea lines of communication — vital for the city-state’s trade-dependent economy. This procurement aligns with the operational philosophies of navies globally, as many maintain larger submarine fleets to manage maintenance demands and enhance readiness.
In sum, this strategic step by MINDEF underscores Singapore’s proactive approach to safeguarding its maritime interests and enhancing its naval capabilities for years to come.