Often used in a combination of two, this Weems & Plath 103 Protractor Triangle provides a straightforward method of plotting and performing chart work. Each triangle is inscribed with black markings. The protractor scale on the triangle can aid in drawing a bearing line on a chart, and the 90 angle is helpful when determining lines of position.

• 7-3/4″ sides x 11″ (19.69 cm x 27.94 cm) hypotenuse
• Protractor scale allows easy alignment with chart meridian in any direction
• Direction is maintained as one triangle is slid along the other to desired position
• 90 angle helps determine lines of position
• Made from clear, durable vinylite