Forbesi logid võeti kaubanduslikult kasutusele Elliott Brothersi poolt 1909. a ja need paigaldati 1912. aastaks kõigile sõjalaevadele, üldiselt selleks, et aidata kaasa lahinguaruandlusele.
The Forbes logs were introduced commercially by Elliott Brothers in 1909 and were fitted to all capital ships by 1912, generally to aid the use of the dumaresq as well as battle reporting.
