Which two items are examples of fieldwork equipment that help achieve accuracy?

• A. Compass and clipboard
• B. GPS device and notebook
• C. Tape measure and thermometer
• D. Anemometer and sextant

Answer: (C)

Field data becomes trustworthy when you use instruments that give precise, numeric readings. A tape measure provides exact lengths with clear units, so you can quantify distances, widths, or gaps without guessing. A thermometer gives a specific temperature value, letting you compare conditions across sites and track changes accurately. Together, they cover two common, fundamental measurements in the field—length and temperature—and both rely on calibrated scales to reduce error.

Other tools can be helpful, but they don’t demonstrate the same direct emphasis on quantitative accuracy in everyday field tasks. A compass helps with direction, not a numeric measurement of a quantity with units. A clipboard is for recording observations, not measurement itself. A GPS device can give location data, but its accuracy depends on signal conditions and may not be as reliable in all environments. Anemometers and sextants measure wind speed and angles, which are more specialized instruments; they’re valuable in specific studies but don’t exemplify the simplest, most universal approach to accuracy across common field measurements.