So if the helmsman stood in front of the wheel to steer, how did he know where he was going? His back would be to the bow.
A helmsman relies upon visual references, a magnetic compas, Cross-staff, Hourglass, Quadrant, Mariner's astrolabe, Kamal
, and a rudder angle indicator to steer a steady course. some of the common tools are located in the binnacle, right in front of the helm.
Compass
The compass originated in China in the 3rd century, but didn't become common in Europe until the 15th century. 16th century compasses displayed a compass rose, which indicated 32 points of direction.
Cross-staff
A rectangular wooden staff with a scale and cross-pieces of different lengths. Sailors would use each cross-piece to measure latitude.
Hourglass
Sailors used sandglasses to measure time, which could range from 30 seconds to hours. They used solid materials instead of liquids, which would thicken with temperature changes.
Quadrant
A simple instrument that used a plumb bob to measure latitude by determining the angle between the sun or a star and the horizon.
Mariner's astrolabe
Developed in the late 15th century, this instrument was used in the 16th and 17th centuries. It was replaced by the back staff, octant, and sextant.
Kamal
Used the position of Polaris (the North Star) to determine latitude. Sailors would tie a knot in a cord, hold the knot between their teeth, and hold the wooden piece out vertically. They would then pull the cord taut to line it up with the North Star.
www.nps.gov