One method involved using tables of the moon's position which had been produced by Tobias Mayer and he sent to the British government in 1755. Maskelyne had also compiled lunar tables but accurate instruments were needed to be able to take bearings from ships before they were useful. Ramsden produced such an instrument in 1767 but it did not give as accurate results as was hoped.
Isang paraan na kasangkot ang paggamit ng mga talahanayan ng buwan ng posisyon na kung saan nagkaroon na nagawa sa pamamagitan ng Tobias Mayer at siya na ipinadala sa British government sa 1755. Maskelyne nagkaroon din ng buwan compiled talahanayan ngunit tumpak na mga instrumento ay kailangan upang ma-tumagal bearings mula sa ships bago sila ay kapaki-pakinabang.