On 1 October you determine the zone time of evening twilight will be 1835. Your DR position will be LAT 27°18.0' N, LONG 48°52.0' W. Considering their magnitude and location, which group of three stars are best suited to be used in obtaining a fix at star time?

Question

On 1 October you determine the zone time of evening twilight will be 1835. Your DR position will be LAT 27&deg;18.0' N, LONG 48&deg;52.0' W. Considering their magnitude and location, which group of three stars are best suited to be used in obtaining a fix at star time?

Accepted Answer

Option C: Alphecca, Kochab, Deneb. Selecting stars for a fix requires a wide azimuth spread to minimize geometric dilution of precision. Bowditch dictates choosing bodies with significant magnitude and roughly 120-degree separation. Alphecca, Kochab, and Deneb provide optimal coverage for the specified latitude and twilight time, ensuring a robust intersection of lines of position.

On 1 October you determine the zone time of evening twilight will be 1835. Your DR position will be LAT 27&deg;18.0' N, LONG 48&deg;52.0' W. Considering their magnitude and location, which group of three stars are best suited to be used in obtaining a fix at star time?

On 1 October you determine the zone time of evening twilight will be 1835. Your DR position will be LAT 27°18.0' N, LONG 48°52.0' W. Considering their magnitude and location, which group of three stars are best suited to be used in obtaining a fix at star time?