In 1911 Van Stockum determined the astronomical longitude of Paramaribo from an absolute moon height in combination with star observations.
It is proved that the astronomical longitude of Paramaribo as published by Roelofs in his book, Astronomy Applied to Land Surveying is based on the astronomical observations of Van Stockum from 1911, corrected for precession and nutation.
Astronomical longitude determinations al Paramaribo have a long history and go back till 1877.
It is at this station where Van Stockum also did ah astronomical longitude determination in 1911, but with a method quite different from that of the navy.
It will also be proved that their value for the astronomical longitude of the Stenen Trap is directly derived from the value of Van Stockum from 1911.
KLM gives for the astronomical longitude of the Stenen Trap : [LAMBDA] = 55[degrees] 09' 10.