Deputy First Sea Lord

E408213

Royal Navy office naval staff position

The Deputy First Sea Lord is a senior Royal Navy post that historically served as the second-in-command to the First Sea Lord, helping direct naval strategy, operations, and administration.

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All labels observed (2)

Label	Occurrences
Deputy First Sea Lord canonical	1
Deputy First Sea Lord and Chief of Naval Staff	1

How this entity was disambiguated

This entity first appeared as the object of triple T4023288 — 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: Deputy First Sea Lord
Context triple: [Rosslyn Wemyss, positionHeld, Deputy First Sea Lord]

A. Vice Chief of the Naval General Staff
The Vice Chief of the Naval General Staff was a senior leadership post within the Imperial Japanese Navy responsible for assisting in the direction and coordination of naval strategy and operations.
B. Chief of Naval Staff
The Chief of Naval Staff is the highest-ranking professional head and principal military advisor of a nation's navy, responsible for its overall command, operations, and strategic direction.
C. First Sea Lord
The First Sea Lord is the professional head of the Royal Navy and its most senior serving officer, responsible for the overall command and strategic direction of the service.
D. Chief of the Naval Staff
The Chief of the Naval Staff is the professional head and highest-ranking officer responsible for overseeing the operations, readiness, and strategic direction of the Russian Navy.
E. Second Sea Lord
The Second Sea Lord is a senior Royal Navy admiral responsible for overseeing naval personnel, training, and related policy within the United Kingdom's naval command structure.
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: Deputy First Sea Lord
Target entity description: The Deputy First Sea Lord is a senior Royal Navy post that historically served as the second-in-command to the First Sea Lord, helping direct naval strategy, operations, and administration.

A. Vice Chief of the Naval General Staff
The Vice Chief of the Naval General Staff was a senior leadership post within the Imperial Japanese Navy responsible for assisting in the direction and coordination of naval strategy and operations.
B. Chief of Naval Staff
The Chief of Naval Staff is the highest-ranking professional head and principal military advisor of a nation's navy, responsible for its overall command, operations, and strategic direction.
C. First Sea Lord
The First Sea Lord is the professional head of the Royal Navy and its most senior serving officer, responsible for the overall command and strategic direction of the service.
D. Chief of the Naval Staff
The Chief of the Naval Staff is the professional head and highest-ranking officer responsible for overseeing the operations, readiness, and strategic direction of the Russian Navy.
E. Second Sea Lord
The Second Sea Lord is a senior Royal Navy admiral responsible for overseeing naval personnel, training, and related policy within the United Kingdom's naval command structure.
F. None of above. chosen

Statements (44)

Predicate	Object
instanceOf	Royal Navy office ⓘ naval staff position ⓘ
appliesToJurisdiction	Royal Navy ⓘ United Kingdom Ministry of Defence ⓘ
country	United Kingdom ⓘ
duty	advise on fleet readiness and deployment ⓘ assist First Sea Lord in directing the Royal Navy ⓘ assist in naval administration ⓘ contribute to defence policy for maritime forces ⓘ coordinate staff work for the First Sea Lord ⓘ help formulate naval strategy ⓘ oversee naval operations planning ⓘ represent the First Sea Lord when delegated ⓘ
employer	Admiralty (United Kingdom) ⓘ surface form: Admiralty United Kingdom Ministry of Defence ⓘ
fieldOfWork	naval administration ⓘ naval operations ⓘ naval strategy ⓘ
hasAlternativeName	Deputy First Sea Lord ⓘ surface form: Deputy First Sea Lord and Chief of Naval Staff
hasRankRequirement	admiral ⓘ vice admiral ⓘ
hasWorkLocation	Old Admiralty Building ⓘ surface form: Admiralty building, London London, England ⓘ surface form: London
historicalFunction	second-in-command of the Royal Navy professional head ⓘ senior member of the Board of Admiralty ⓘ
isModeledAfter	staff deputy to a service chief ⓘ
isPositionInHierarchy	above most other naval staff officers ⓘ First Sea Lord ⓘ surface form: below First Sea Lord
officeHeldBy	Royal Navy admiral ⓘ Royal Navy admiral ⓘ surface form: Royal Navy flag officer
officeType	professional headship support role ⓘ senior naval staff post ⓘ
partOf	Admiralty (United Kingdom) ⓘ surface form: British Admiralty Royal Navy ⓘ
responsibleFor	coordinating naval staff branches ⓘ implementing strategic directives of the First Sea Lord ⓘ supporting overall command of the Royal Navy ⓘ
secondInCommandTo	First Sea Lord ⓘ
sector	defence ⓘ military ⓘ
subordinateTo	First Sea Lord ⓘ
usedInPeriod	20th century ⓘ World War I ⓘ surface form: World War I era World War II era ⓘ

How these facts were elicited

Referenced by (2)

Full triples — surface form annotated when it differs from this entity's canonical label.

Admiral Rosslyn Wemyss → positionHeld → Deputy First Sea Lord ⓘ

subject surface form: Rosslyn Wemyss

Deputy First Sea Lord → hasAlternativeName → Deputy First Sea Lord ⓘ

this entity surface form: Deputy First Sea Lord and Chief of Naval Staff

All labels observed (2)

How this entity was disambiguated Show

Statements (44)

How these facts were elicited Show

Referenced by (2)

How this entity was disambiguated

How these facts were elicited