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Castletown Golf Club

USGA COURSE RATING INFORMATION

A USGA Course Rating (Scratch Score) is the evaluation of the playing difficulty of a course for

scratch golfers under normal course and weather conditions. It is expressed as the number of

strokes taken and is based on yardage and other obstacles to the extent that they affect the scoring

difficulty of the scratch golfer.

Bogey Rating A Bogey Rating is the evaluation of the playing difficulty of a course for bogey golfers

under normal course and weather conditions. It is based on yardage and other obstacles to the

extent that they affect the scoring difficulty of the bogey golfer. The evaluation is not used in

calculation of the scratch score and will only be used when Slope is introduced.


The Rating Process

The rating process requires a study of each hole, including details data obtained at all landing zones

for both the scratch and the bogey golfer. The rating teams use the average shot lengths for both

scratch and bogey golfers to determine the land zones. Length corrections and obstacle values are

considered at each landing zone.


Effective Playing Length Factors

The following correction factors are evaluated to determine if the hole is effectively longer or

shorter than the actual measured length.

Roll: Roll is an evaluation of how far the tee shots for scratch and bogey golfers roll, and the

effect that has on the playing length of the course.

Elevation: Elevation is a measure of how changes in elevation from tee to green affect the

playing length of a hole.

Dogleg/Forced Lay-Up: Dogleg/Forced lay-up is a measure of how much longer or shorter a

hole is played because it has a bend (allowing players to cut the corner or forcing them to lay

up), or because it has obstacles, such as water or deep bunkers, crossing the fairway in the

players’ landing zones (which force the scratch or bogey golfer to hit less than a full shot).

Prevailing Wind: Prevailing wind is a measure of the effect of constant wind on seaside

course, plains courses, or other courses unprotected from the wind.


Obstacle Factors

The following obstacle factors are determined for each landing zone for both

the scratch and the bogey golfer:

Topography: Topography is a factor if the stance or lie in the landing zone is

affected byslopes or mounds, or the shot to the green is uphill or downhill, making club

selection more difficult.

Fairway: Fairway is an evaluation of the difficulty of keeping the ball in play from tee to

green. Fairway ratings are based on fairway width in all landing zones, hole length, and

nearby tree, hazards, and punitive rough.

Green Target: Green Target is an evaluation of the difficulty of hitting the green with the

approach shot. Primary considerations are target size, length of shot, how well the green

holds, and the difficulty of normal hole locations.

Recoverability and Rough: Recoverability and Rough is the evaluation of the probability of

missing the tee shot landing zone and the green, and the difficulty of recovering if either, or

both, is missed.

Bunkers: Bunkers is the evaluation of their proximity to target areas and the difficulty of

recovery from them.

Out of Bounds/Extreme Rough: OB/Extreme Rough is the evaluation of the distance from

the centre of the landing zone to the OB/Extreme Rough. High grass, heavy underbrush in

trees, and other extreme conditions are rated in this category because a ball in such

“extreme rough” is likely to be lost or virtually unpayable. Such areas may also be rated

under Recoverability and Rough.

Water Hazards: Water Hazards is the evaluation of a water hazard and its distance from the

landing zone or green and, in the case of a hazard crossing a hole, the problem involved in

playing over the hazard. The Water Hazards rating is applied on any hole where there is a

water hazard or lateral water hazard.

Trees: Trees is the evaluation of the size and density of the trees, their distance from the

centre of the landing zone or green, the length of the shot to the target, and the difficulty of

recovery.

Green Surface: Green Surface is the evaluation of a green’s difficulty from the putting

standpoint. Green speed and surface contouring are the main factors. The size of the green

is considered irrelevant in evaluation putting difficulty. A stimpmeter is utilized to measure

the speed of the greens based on midseason conditions.

Psychological: Psychological is the evaluation of the cumulative effect of the other obstacles.

The location of many punitive obstacles close to a target area creates uneasiness in the mind

of the player and thus affects his or her score. This value is purely mathematical and is

added after the on-course rating is complete.

Each obstacle is assigned a value of 0 to 10, depending on its relation to how a scratch or bogey

golfer would play the hole. When the evaluation is complete, the numbers for each hole’s obstacles

are totalled and multiplied by a relative weighting factor. The weighted obstacle stroke values are

applied to scratch and bogey formulas and then converted to strokes. Those strokes are added or

subtracted from the Yardage Rating to produce a Bogey Rating and the USGA Course Rating.

Although a Bogey Rating is calculated it is not used to produce the Course Rating/Scratch Score.

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