Domain:

crmsci:S23 Position Determination

Range:

crm:E94 Space Primitive

Quantification:

0,n:0,n

Subproperty of:

• crmsci:S4 Observation → crmsci:O16 observed value (value was observed by) → crm:E1 CRM Entity

Scope note:

This property associates an instance of S23 Position Determination with the instance of E94 Space Primitive which is the result of that determination. The instance of E94 Space Primitive approximates the place occupied by the entity whose position is being determined.

Examples:

• The determination of the position of the Titanic for the initial distress call after hitting an iceberg (S23) determined position 41°44′N 50°24′W (E94). [This was quickly determined via ‘dead reckoning’, i.e. based on the distance travelled since the previous known location, extrapolating a previous dead reckoning for 14 April 1912 20:00] (Halpern, 2011, Boxhall, 1962).
• The determination of the position of the Titanic by officer Joseph G. Boxhall after the initial distress signal was sent (S23) determined position 41°46′N 50°14′W (E94). [This was again determined via dead reckoning but extrapolating Boxhall's own determination shortly after 20:00, and revised the original position.] (Halpern, 2011, Boxhall, 1962).
• The calculation of the position of the Titanic by Robert Ballard's team after the Titanic shipwreck was found (S23) determined position 41°43′32′′N 49°56′49′′W (E94). [This was the position of the centre of the ‘boiler field’, part of the Titanic debris] (Ballard et al., 1987).
• Samuel Halpern’s 2007 determination of the position of the Titanic at the time of the collision (S23) determined position 41°45.5′N 49°55′W (E94). [This was based on the position of the boiler field and the ocean drift at the time.] (Halpern, 2007).

In First Order Logic:

• O30(x,y) ⇒ S23(x)
• O30(x,y) ⇒ E94(y)
• O30(x,y) ⇒ O16(x,y)