Polar Class 5
E318853
Polar Class 5 is an ice-strength rating for ships designed to operate year-round in medium first-year ice conditions, which may include old ice inclusions.
All labels observed (2)
| Label | Occurrences |
|---|---|
| IACS Polar Class system | 1 |
| Polar Class 5 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3000795 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Polar Class 5 Context triple: [Harry DeWolf-class offshore patrol vessel, iceCapability, Polar Class 5]
-
A.
Crown Class
Crown Class is Royal Jordanian's premium business-class cabin product, offering enhanced comfort, service, and amenities on the airline’s flights.
-
B.
Bagley class
The Bagley class was a group of U.S. Navy destroyers built in the late 1930s that saw extensive service during World War II, particularly in the Pacific Theater.
-
C.
Icebreaker Sampo
Icebreaker Sampo is a former Finnish icebreaker turned popular tourist vessel offering ice-cruises and Arctic experiences in the Gulf of Bothnia near Kemi.
-
D.
RV Vityaz
RV Vityaz was a Soviet research vessel renowned for its deep-sea oceanographic expeditions, including pioneering surveys of the Challenger Deep in the Mariana Trench.
-
E.
Olympic class
The Olympic class was a trio of early 20th-century British ocean liners built for the White Star Line, renowned for their size, luxury, and including the ill-fated RMS Titanic.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Polar Class 5 Target entity description: Polar Class 5 is an ice-strength rating for ships designed to operate year-round in medium first-year ice conditions, which may include old ice inclusions.
-
A.
Crown Class
Crown Class is Royal Jordanian's premium business-class cabin product, offering enhanced comfort, service, and amenities on the airline’s flights.
-
B.
Bagley class
The Bagley class was a group of U.S. Navy destroyers built in the late 1930s that saw extensive service during World War II, particularly in the Pacific Theater.
-
C.
Icebreaker Sampo
Icebreaker Sampo is a former Finnish icebreaker turned popular tourist vessel offering ice-cruises and Arctic experiences in the Gulf of Bothnia near Kemi.
-
D.
RV Vityaz
RV Vityaz was a Soviet research vessel renowned for its deep-sea oceanographic expeditions, including pioneering surveys of the Challenger Deep in the Mariana Trench.
-
E.
Olympic class
The Olympic class was a trio of early 20th-century British ocean liners built for the White Star Line, renowned for their size, luxury, and including the ill-fated RMS Titanic.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
ice-strength rating
ⓘ
polar ice class ⓘ ship classification ⓘ |
| appliesTo |
ice-strengthened vessels
ⓘ
ships ⓘ |
| classificationScope |
hull structural strength
ⓘ
propulsion system strength ⓘ steering system strength ⓘ |
| definedBy | International Association of Classification Societies ⓘ |
| designedForOperationIn |
medium first-year ice
ⓘ
medium first-year ice with old ice inclusions ⓘ |
| iceConditionType |
first-year ice
ⓘ
old ice inclusions ⓘ |
| intendedSeasonOfOperation | year-round ⓘ |
| partOf |
Polar Class 5
self-linksurface differs
ⓘ
surface form:
IACS Polar Class system
|
| relatedRegulation | IMO Polar Code ⓘ |
| relativeStrengthRanking |
stronger than Polar Class 6
ⓘ
stronger than Polar Class 7 ⓘ weaker than Polar Class 1 ⓘ weaker than Polar Class 2 ⓘ weaker than Polar Class 3 ⓘ weaker than Polar Class 4 ⓘ |
| safetyObjective |
enable independent navigation in specified ice conditions
ⓘ
ensure structural integrity in medium first-year ice ⓘ |
| typicalShipTypes |
ice-capable cargo ships
ⓘ
ice-capable offshore support vessels ⓘ ice-capable research vessels ⓘ |
| usedIn |
Antarctic shipping
ⓘ
Arctic shipping ⓘ polar waters ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Polar Class 5 Description of subject: Polar Class 5 is an ice-strength rating for ships designed to operate year-round in medium first-year ice conditions, which may include old ice inclusions.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
IACS Polar Class system