Seed drill further refined by Jethro Tull in 1701 in the Agricultural Revolution. However, seed drills of this and successive types were both expensive and unreliable, as well as fragile. Seed drills would not come into widespread use in Europe until the mid to late 19th century, when manufacturing advances such as machine tools, die forging and metal stamping allowed large scale precision manufacturing of metal parts. Early drills were small enough to be pulled by a single horse, and many of these remained in use into the 1930s. The availability of steam, and later gasoline tractors, however, saw the development of
Muster drill is the responsibility of the crew to ensure that a muster drill is held and that every passenger and crew member is aware that it is being held. If a muster drill cannot be held, a report in the logbook must be made to state the circumstances. Laws in some places hold crew members liable to face civil charges if they voluntarily do not attend the muster drill. For example, in some US states, those who do not attend are fined varying amounts, depending on their rank. Muster drills are typically not conducted and are usually not required for short