Plotters

Weems Parallel Plotter This instrument consists of a plotter mounted on a roller. The plotter contains distance scales at 1:20,000, 1:40,000, and 1:80,000 to fit the N.O.S. Coast and Harbor Charts, as well as an inch scale. Included are a semi-circular protractor for measuring courses and bearings against a meridian on the chart, and two quarter circle protractors for measuring courses and bearings against a parallel of latitude. Courses and parallel lines are transferred and kept parallel by means of two rollers which are mounted on a slide axis. Used for measuring or laying off courses and distances on a nautical chart. Instructions included.
Qty	Product	Description	Price
	WP120	Weems Parallel Plotter	$ 19.95
Weems Compact Parallel Plotter A smaller version of our traditional rolling plotter. The 8" x 2" plotter, mounted on a marine aluminum roller assembly, contains a semi-circular protractor, distance scales of 1:20,000 and 1:40,000, as well as an inch scale. Dimensions: 2" x 8".
Qty	Product	Description	Price
	WP060	Compact Parallel Plotter	$ 16.79
Weems Course Plotter This is a 15" course plotter with a semi-circular protractor scaled from 180° to 360° inside. Lower edge scales 1:80,000 and 1:40,000 to accommodate National Ocean Survey charts. For north and south courses, a small auxiliary protractor scale is printed inside the larger one and is used against a parallel latitude. The upper edge is scaled 1 inch equal to 20 miles to accommodate the VPOS Universal Plotting Sheets. Dimensions: 4.375" x 15".
Qty	Product	Description	Price
	WP133	W & P Course Plotter	$ 10.50
Vecta-Rose The Vecta-Rose is a pressure sensitive compass rose that can be applied directly to your charts when the printed rose is not in a convenient location. Can be oriented to either true or magnetic north for handy reference. Dims: 4.5" x 4.5".
Qty	Product	Description	Price
	WP512V-6	Vecta Rose 6 Pack	$ 5.50
	WP512V-12	Vecta Rose 12 Pack	$ 8.50
Three Arm Protractor Heavy duty, crystal clear acrylic construction is the foundation for this simple to use, professional plotting aid. Arms are rigid enough to trace a bearing line. Can be used to position and chart from three identifiable shore, landmark, or buoy locations. Just measure the angles on the protractor and locate your position on the chart. Moveable arms have a vernier scale for even more precise measurements. Dims: 6" x 21".
Qty	Product	Description	Price
	WP116	W & P Three Arm Protractor	$ 23.95
Weems Protractor This navigation tool is versatile and can be used to lay off a course or a bearing, measure distance between any two points, plot a position on a chart from a given set of coordinates, or determine the coordinates of a position on a chart. It is an updated version of the Breton and Portland Plotters. Pencil and sharpener included. Dims: 15" x 5".
Qty	Product	Description	Price
	WP255	Weems Protractor	$ 16.99
The Original Bi-rola This rule’s patented vertical and horizontal rolling motion simplifies course and plotting calculations, while the unique radial arm allows you to automatically include compass corrections in your course plotting. Features: Patented four-way rolling motion Roller body has protractor markings and a nautical mile scale Radial arm has Loran interpolator scales and 200 millimeter rule Automatic compass corrections When radial arm and body are used jointly, the birola rule becomes a 440 mm (17") divider (approximately) A speed/time/distance table is included Easy to follow instructions Packaged in a protective, durable vinyl pouch Dims: Length 13-7/8", Width 2-5/8", Thickness 1". Wt. 12 oz.
Qty	Product	Description	Price
	WP155	Bi Rola Rule	$ 46.95
P.R. 500 Rolling Plotter Made with the professional in mind, the P.R. 500 has aconsiderably larger body than the smaller bi-rola rule. Built to take rigorous use aboard commercial and blue water vessels, the P.R. 500 provides one of the easiest methods invented for plotting courses. Features: Patented four-way rolling motion Roller body has protractor markings every 1/2 degree 1-1/4" magnifying lens for enhancing chart data Easy to follow instructions Packaged in a protective, durable vinyl pouch Dims: Length 19-5/8", Width 3-5/8", Thickness 1-1/4".
Qty	Product	Description	Price
	WP220	Bi Rola Rule P.R. 500 Rolling Plotter	$ 95.50
Square Course Plotter Used by the United States Power Squadrons for years, this plotter is a similar design to our square protractor, only it is slightly larger and incorporates a compass rose in the center to make calculating courses, bearings, and variation much easier. Comes in a convenient storage sleeve imprinted with easy to follow instructions. Dims: 7-3/4" x 9 2802 Square Protractor (Not Shown) This plain edge protractor is suitable for plotting courses and bearings. Notations can be made directly on the matte plastic surface with a pencil. Constructed of durable, transparent plastic. Instructions included. Dims: 5" square.
Qty	Product	Description	Price
	WP2802	W & P Square Protractor 5inch	$ 8.50
Compute-A-Course The Weems & Plath Compute-A-Course™ is a compact, multi-purpose plotting tool. Ideal for general boating or commercial use. The Compute-A-Course™ can be used for position fixing, course plotting, and distance measurements with the included scales. Using the log scale on the instructions, time/distance calculations are a snap. Instructions included. Dims: 7-3/16" w x 8-1/2" h.
Qty	Product	Description	Price
	WP111	W & P Compute A Course	$ 23.95
Tactician's Calculator The Tactician’s Calculator is a hand-held tool for the racing sailor. This easy-to-use tool provides you with a visual depiction of what is happening on the racecourse. The Tactician’s Calculator can help you determine: how square a starting line or racecourse is, what your heading will be on the opposite tack or gybe, how close you are to layline, and what point of sail you will be on for the next leg of the race. On the reverse side of the tool, there is a key to the most commonly used racing code flags that gives you a picture of the flag and an explanation of its meaning. There is also a speed/time/distance table, and an area to record both wind and racecourse information. The Tactician’s Calculator comes with a #2 pencil and has holes punched in all four corners for easy tethering. Dims: 6"x 8 1/4".
Qty	Product	Description	Price
	WP112	Tactician s Calculator	$ 33.59
Vectormaster An advanced navigation tool, the circular slide rule provides for the solution of time, speed and distance, fuel consumption, conversions, multiplication, and division. On the reverse, the face of the Vectormaster permits rapid solution of problems involving vectors, such as those encountered in current sailing, the determination of true wind direction and force, and the apparent wind to be expected on other headings. Given the position of a storm, and the direction and speed of its advance, you may quickly determine the course which will put maximum distance between your vessel and the oncoming storm. Instruction booklet included. Dims: 7" square.
Qty	Product	Description	Price
	WP501V	W & P Vectormaster	$ 25.95
Nautical Slide Rule Gives immediate solution to all speed-time-distance problems. Equally applicable for nautical or statute miles. Speed in knots or m.p.h., time in hours, minutes, or seconds, and distance in nautical or statute miles (or yards if desired, and if speed is in knots.) Easy to read and accurate. Standard in U.S. Navy. Dims: 7-3/8" square.
Qty	Product	Description	Price
	WP105	Nautical Slide Rule	$ 17.95
Course & Leg Identifier for Expanding Square Pattern & Sector Pattern Searches Also known as the Search Pattern Slide Rule or Coast Guard Plotter, this tool is a “must have” for active duty Coast Guard, Auxiliarists, or anyone else who might have to run a search pattern. The Course & Leg Identifier quickly calculates the heading and run time for each leg of either an expanding square pattern or sector pattern search, giving you more time to focus on the search. Dims: 6"x 9".
Qty	Product	Description	Price
	WP113	Course & Leg Identifier	$ 20.99
Universal Plotting Sheets These are also known as VP-OS sheets. A graduated circle printed at the center allows meridians of longitude to be constructed for any latitude, thus creating a custom-made chart for any geographical position. Available as a 50-page Plotting Sheet Pad. Dims: 12-7/8"x 14".
Qty	Product	Description	Price
	WP5910	Universal Plotting Sheet	$ 9.50
Radar Collision Avoidance and Current Plotting Board Set Provides the mariner with an easy method for plotting radar targets to determine their course speed and possible risk of collision. Where current exists, navigators can also use the board for determining course to steer. Complete instructions and examples from the Editors of Ocean Navigator Magazine are printed on the back. Constructed of matte finished, film laminated PVC, the board is designed to be used with a lead pencil for accuracy, then erased. Provided complete with a special suction cup/pencil point compass. Dims: 13" square.
Qty	Product	Description	Price
	WP10855	W & P Collision Avoidance Board Set	$ 24.95