Say hello to #🇸🇬 Navy’s newest submarine – Invincible! She will be the first of the four Invincible-class submarines customised to operate in our shallow and busy tropical waters. They can also stay submerged longer and carry more weapons than previous submarines. pic.twitter.com/jTZ4g02abH— Ng Eng Hen (@Ng_Eng_Hen) February 18, 2019
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