{{short description|Chinese research vessel}} {{about|State Oceanic Administration North Sea Branch research vessel|similarly-named research vessel operated by the Sun Yat-sen University|Zhong Shan Da Xue Ji Di}} {{Infobox ship |infobox_caption= |display_title=ital |section1={{Infobox ship/image |image= |image_size= |image_caption= |image_alt= }}
|section2={{Infobox ship/career |hide_header= |country=China |flag={{shipboxflag|China}} |name=''Ji Di'' |namesake= |owner= |operator=State Oceanic Administration North Sea Branch |registry=Qingdao, China<ref name="ccs" /> |ordered= |builder=Guangzhou Shipyard International (Guangzhou, China) |original_cost= |yard_number=21110017 |laid_down= |launched=29 December 2023 |sponsor= |christened= |completed=22 May 2024<ref name="ccs">{{csr|register=CCS|id=22S0126|shipname=Ji Di|accessdate=1 July 2024}}</ref> |maiden_voyage= |in_service= |out_of_service= |identification=* {{IMO number|9970351}}<ref name="seaweb">{{csr|register=SEAWEB|id=9970351|shipname=Ji Di|accessdate=24 April 2024}}</ref><ref name="equasis">{{csr|register=E|id=9970351|shipname=Ji Di|accessdate=24 April 2024}}</ref> * {{call sign|BPNU5}}<ref name="ccs" /> |captured= |status=In service |notes= }}
|section3={{Infobox ship/characteristics |hide_header= |header_caption= |type=Research vessel |tonnage=* {{GT|4539}} * {{NetT|1361}} * {{DWT|1763}} |displacement={{cvt|5600|t|LT}} |length={{cvt|89.95|m|ft|0}} |beam={{cvt|17.8|m|ft}} |height= |draft={{cvt|5.5|m|ft}} |depth= |ice_class=Polar Class 6 |power=Four main diesel generators |propulsion=Diesel-electric; two ABB Azipod units (2{{nbsp}}×{{nbsp}}3.2{{nbsp}}MW) |speed={{convert|15|kn}} |range={{convert|14000|nmi}} |endurance=80 days |boats= |capacity= |crew=60 |sensors= |notes= }} }}
'''''Ji Di''''' ({{zh|s=极地|t=極地|l=Polar}}) is a Chinese icebreaking research vessel built in 2024 for the State Oceanic Administration North Sea Branch.
Concurrently with ''Ji Di'', Guangzhou Shipyard International built a slightly bigger Polar Class 4 research vessel, ''Tan Suo San Hao'', which was delivered in December 2024.
== Design ==
''Ji Di'' is {{convert|89.95|m|ft|0}} long overall and has a beam of {{convert|17.8|m|ft}} and draft of {{convert|5.5|m|ft}}.<ref name="ccs" /> The {{convert|5600|t|LT|adj=on}} vessel has accommodation for 60 persons, operational range of {{convert|14000|nmi}}, and can remain at sea for 80 days.<ref name="dailyqd_20231229">{{cite web|url=https://www.dailyqd.com/guanhai/294009_1.html|title=自然资源部北海局投资建造！5600吨"极地"号破冰科考船出坞|language=zh|trans-title=The Beihai Bureau of the Ministry of Natural Resources invested in and built it! The 5,600-ton icebreaking scientific research vessel "Polar" undocking|website=dailyqd.com|date=29 December 2023|accessdate=24 April 2024}}</ref><ref name="cnwest_20231229">{{cite web|url=http://m.cnwest.com/tianxia/a/2023/12/29/22200761.html|title="极地"号破冰科考船今天将首次亮相 "定妆照"抢鲜看|language=zh|trans-title=The ice-breaking scientific research vessel "Polar" will make its debut today in "fixed photos" for a sneak peek|website=CNWEST.COM|date=29 December 2023|accessdate=24 April 2024}}</ref>
''Ji Di'' has a diesel-electric propulsion system with four main diesel generators and two {{convert|3.2|MW|hp|adj=on}} ABB Azipod azimuth thrusters.<ref name="seaweb" /><ref name="navigator_20240104">{{cite web|url=https://navigatormagazine.fi/uutiset/meriteollisuus/kiina-rakentaa-jo-neljatta-jaanmurtajaansa-guangzhoun-telakalla/|title=Kiina rakentaa jo neljättä jäänmurtajaansa Guangzhoun telakalla|language=fi|website=Navigator Magazine|date=4 January 2024|accessdate=24 April 2024}}</ref> The ship's speed in open water is {{convert|15|kn}}<ref name="ccs" /> and it can break {{convert|1|m|ft|adj=on}} level ice at a speed of {{convert|1.5|to|2|kn}}.<ref>{{Cite tweet|user=lylegoldstein|number=1758339365736992857|title=New Chinese icebreaker being built in Guangdong. Jianchuan Zhishi-China, 3.2024.}}</ref><ref name="ccs_20240122">{{cite web|url=https://www.ccs.org.cn/ccswzen/articleDetail?id=202401221185508720|title=The Surveyor Revealed the "Identity" Information of the Ship in an Interview with CCTV|website=China Classification Society|date=22 January 2024|accessdate=24 April 2024}}</ref>
''Ji Di'' is built to Polar Class 6,<ref name="seaweb" /><ref>{{cite web|url=https://www.eurasiantimes.com/header-china-got-its-fourth-polar-research/amp/|title=Polar Research Vessel: China Races Ahead With 4th Icebreaker 'Ji Di'; India Bets On Russia For Joint Venture|date=27 June 2024|accessdate=1 July 2024|website=The EurAsian Times}}</ref> the second-lowest ice class defined in the International Association of Classification Societies (IACS) ''Unified Requirements for Polar Class Ships'', which is intended for summer and autumn operation in medium first-year ice between {{cvt|70|and|120|cm|in}} in thickness that may contain small inclusions of old sea ice that has survived at least one summer without melting completely.<ref name="pc">[https://iacs.s3.af-south-1.amazonaws.com/wp-content/uploads/2022/02/12082657/uri-1.pdf Unified Requirements for Polar Class ships] {{webarchive|url=https://web.archive.org/web/20120620102507/http://www.iacs.org.uk/document/public/Publications/Unified_requirements/PDF/UR_I_pdf410.pdf |date=2012-06-20 }}. International Association of Classification Societies (IACS), April 2016. {{retrieved|accessdate=2024-02-16}}</ref><ref name="wmo">{{cite web|publisher=World Meteorological Organization|title=Guide to meteorological instruments and methods of observation: Sea Ice Nomenclature, 7th ed.|pages=12–13|url=https://library.wmo.int/doc_num.php?explnum_id=4651|access-date=1 July 2024|archive-date=2 May 2023|archive-url=https://web.archive.org/web/20230502073651/https://library.wmo.int/doc_num.php?explnum_id=4651|url-status=dead}}</ref>
== History ==
The ship's construction was awarded to Guangzhou Shipyard International, a subsidiary of the China State Shipbuilding Corporation, in March 2022 and the construction began shortly afterwards.<ref name="seaweb" /> It was floated out on 29 December 2023<ref name="dailyqd_20231229" /><ref name="cnwest_20231229" /> and completed on 22 May 2024.<ref name="ccs" />
''Ji Di'', Chinese for "polar", entered service with the State Oceanic Administration North Sea Branch on 24 June 2024.<ref name="seaweb" /><ref>{{cite web|url=https://www.guancha.cn/politics/2024_06_24_739044.shtml|title="极地"号破冰调查船今天在广州命名交付|trans-title=The "Polar" icebreaker survey ship was named and delivered in Guangzhou today|date=24 June 2024|website=观察者|accessdate=24 June 2024}}</ref> In August, the ship left for its first voyage to the Arctic.<ref>{{cite web|url=https://www.newsweek.com/china-news-icebreakers-challenge-us-staying-power-arctic-russia-1945914|title=China's Icebreakers Challenge US Staying Power on Arctic Frontier|date=29 August 2024|accessdate=3 September 2024|website=Newsweek}}</ref>
== References == {{reflist}}
Category:Icebreakers of China Category:Research vessels of China Category:2023 ships