High Quality Content by WIKIPEDIA articles! HMNZS Kahu (A04) was a Moa class inshore patrol vessel of the Royal New Zealand Navy. She was launched in 1979 as the lead boat of her class, modified to function as a diving tender. She was initially named HMNZS Manawanui (A09), the second of three diving tenders with this name to serve in the New Zealand Navy. As a diving tender she participated in the exploration and salvage work of the wreck MS Mikhail Lermontov in March 1986.