The 18” Aluminum Arm Parallel Ruler features aluminum arms and handles.
A thoroughly clear and well-tried instruction course in basic coastal navigation, used by the Royal Navy at Dartmouth. Full colour illustrations and clear layout. Ideal for beginners in chart work.
The fx-83GTX replaces the Casio Fx-GT scientific calculators which takes Ireland's Number One Scientific Calculator a step further, by offering additional features such as clearer display, clearer menus, faster processor and 14 additional functions. Allowed in every Irish exam where a calculator can be used. The large Natural Textbook Display (Natural-V.P.A.M.) shows mathematical expressions like roots and fractions as they appear in your textbooks which increases comprehension because results are easier to understand.
2B is the recommended pencil for chart work.
Normally used in conjunction with parallel rules for chartwork.
We all rely on charts to navigate at sea – but are we missing essential information? A mass of data is included on each chart and deciphering the many symbols and abbreviations can be complicated. The accuracy of some charted depths can be trusted entirely while others should be treated with caution. This book will tell you where to find and how to understand this vital knowledge.
- Precision compasses with obtuse-angled safety needle
- Maximum circle Ø approx. 300 mm
- Length 124.2 mm
- Compass with lead part and lead box in case with hinged lid