Overview

• Singapore's Ministry of Defence formalized a contract with Thyssenkrupp Marine Systems on May 8, 2025, to acquire two additional Invincible-class submarines.
• The acquisition will increase the Republic of Singapore Navy's fleet to a total of six submarines, strengthening its ability to safeguard critical sea lines of communication.
• The new submarines, customized for operations in shallow, busy tropical waters, will feature advanced air-independent propulsion and lean crew operation capabilities.
• The first two Invincible-class submarines, RSS Invincible and RSS Impeccable, were commissioned in September 2024, with the third and fourth vessels expected to arrive in Singapore by 2028 following trials in Germany.
• The expansion is part of Singapore's long-term strategy to modernize its navy and maintain sustained maritime readiness in the region.