page_title: List of Japan Coast Guard vessels and aircraft
section_title: HL (Hydrographic Survey Vessel Large)
hierarchical_section_title: List of Japan Coast Guard vessels and aircraft / Fleet / HL (Hydrographic Survey Vessel Large)
caption_attribution_description: 日本語: 海上保安庁では、「海上保安体制強化に関する方針」（平成２８年１２月海上保安体制強化に関する関係閣僚会議決定）に基づき、海洋調査体制の強化を進めています。その一環として、令和２年１月２９日、海上保安庁最大となる測量船「平洋」が就役します。
context_page_description: List of Japan Coast Guard vessels and aircraft.
context_section_description: Heiyō class (2nd)
  Shōyō (2nd)
  Meiyō class (2nd)
  Tenyō (2nd)
  Takuyō (2nd)
  Shōyō (1st)
  Meiyō (1st)
  Takuyō (1st)
caption: HL 11 was sailing in the sea
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