The ability of golfers to read greens using their own judgment is an essential skill that should be maintained; at the same time, R & A has defined which devices and / or materials can be used for reading the green.
The R & A interpretation, after about 6 weeks of feedback, limits the size and scale of detailed maps of the green and of all similar electronic or digital materials that a player can use during a round to assist in reading his own line of playon the green.
INTERPRETATION OF THE RULES
Golfers may continue to use a map or other information for the green, but limited to a 3/8 inch to 5 yards (1: 480) or lower.Any pantry or other sheet containing a map or the image of a green should not be larger than 4 ¼ inches x 7 inches (13 x 18 cm) A “Map with hole positions” showing nine or more holes on a mapa single sheet of paper may be larger, provided that any image of a single green meets the scale limit.No enlargement of the green information is permitted, except for the normal use of eyeglasses or lenses by a player.The hand-drawn or written information, relating to a green, is allowed only if contained in a sheet or in a map, which respects the size limit, and prevailingly written by the player and / or his caddy.
The final interpretation clearly defines that any use of electronic or digital maps of the green must respect the same limits as above. A player is still in violation of Rule 4.3 if he uses any device that does not comply with the purpose, including: (1) Increase the size of the representation of the green beyond the limits of scale or size. (2) Produce a recommended play line based on the position (or the estimated position) of the player’s ball (see rule 4.3a (1)).
The R & A and the USGA will continue to evaluate the future development and use of Green reading materials and will, at the same time, make sure that they know the impact of the new interpretation of this article to see if further changes are needed.