Weems & Plath Nautical Slide Rule

Size:	184 × 184 × 2 mm

£21.95

Includes 20% VAT. Shipping calculated at checkout.

Delivery Information

We dispatch most orders within one working day.

Admiralty charts are printed to order and are dispatched within two working days. If you'd like to know our current dispatch time or if you're up against a deadline please get in touch and we will do our best to help.

Shipping is free on orders over £50.

We ship to the UK. If you're ordering from outside the UK, get in touch and we'll see what we can do.

Friendly Advice

Got a question or need help finding something? We're a seafarer-run business and we're happy to help.

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We're available seven days a week.

Returns

Not what you were looking for? No problem. We accept returns of items in as-sold condition within 30 days. Just let us know and we'll sort everything out, including the cost of return shipping.

Please note that Admiralty charts are not returnable as they are printed to order. See our returns policy for more information.

If anything arrives faulty or damaged, get in touch and we'll sort it out.

Speed, Time and Distance

Circular slide rule: set two, read the third

A 7¼-inch (18.4 cm) circular slide rule for speed, time and distance: set any two and read the third. Speed in knots or miles per hour; time in hours, minutes or seconds; distance in nautical or statute miles, or in yards when the speed is in knots. Limited lifetime warranty.

How to use it

Turn the dial until two known values line up on their scales and read the third: the distance run from speed and time, the speed made good from distance and time, or the time to go.

About Weems & Plath

Founded in 1928 by Lieutenant Commander Philip Van Horn Weems, Weems & Plath has a long history of making instruments for navigators, from the Weems Plotter to the Second Setting Watch.