Recent Images Reveal Singapore’s Fourth Type 218SG Submarine “Impeccable” Nearing Completion
The integration of four Type 218SG Invincible-class submarines—named "Invincible," "Impeccable," "Illustrious," and "Inimitable"—is poised to significantly elevate the underwater warfare capabilities of the Republic of Singapore Navy to a new level. This strategic enhancement comes as the navy has previously relied on second-hand submarines from the Archer and Challenger classes for its undersea operations.

(DEFENCE SECURITY ASIA) — A recent photograph taken by photographer Eckhard Uhrbrock vividly captures the near completion of Singapore’s fourth Type 218SG Invincible-class submarine, dubbed “Inimitable.”
The image strongly suggests that the vessel is undergoing the final stages of its physical construction, preparing it to enter sea trials.
Upon completion of its sea trials in the waters around the ThyssenKrupp Marine Systems (TKMS) shipyard in Kiel, Germany, this fourth Type 218SG Invincible-class submarine will be ready to be handed over to its final operator, the Republic of Singapore Navy (RSN).
Upon arrival in Singapore, “Inimitable” is expected to undergo further sea trials conducted by the RSN before its official commissioning into the fleet, a process similar to that of another Singaporean Type 218SG submarine, “Impeccable.”
In July last year, the Republic of Singapore Navy officially accepted its first of the four Type 218SG Invincible-class submarines ordered from Germany, “Impeccable,” according to a statement released by the republic’s Ministry of Defence.

Launched in Kiel, Germany, on December 31, 2022, “Impeccable” is designed for operations in Singapore’s shallow and busy tropical waters.
Singapore and TKMS signed two separate contracts in 2013 and 2017 for the acquisition of four Type 218SG Invincible-class submarines named “Invincible,” “Impeccable,” “Illustrious,” and “Inimitable,” all tailored to meet Singapore’s specific requirements with unique features.
Previously reported, the lead submarine of the Type 218SG Invincible class, RSS Invincible, was launched in 2019 but remained in Germany for crew training purposes.
The second submarine, “Impeccable,” has been in Singapore since last year, undergoing advanced sea trials by the Republic of Singapore Navy, before its official service commissioning.
The latest Singaporean submarine arrived in the republic’s waters aboard the heavy load carrier “Rolldock Storm” via the Strait of Malacca.
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