Size: Typically 2.5 to 3 inches in diameter for compact models, up to 5 inches for larger versions.
Grade: Military-grade (MIL-SPEC) or commercial-grade, depending on the model.
Viscosity: Not applicable (N/A) for solid components; liquid-filled compasses may use damping fluids like mineral oil or ethanol.
Buoyancy: Generally buoyant if made with lightweight materials, but not a primary feature.
Material: Polycarbonate or acrylic mirror surface, stainless steel or aluminum housing, and high-impact plastic or rubberized casing.
Compass Type: Liquid-filled with a floating dial, often luminous for low-light visibility.
Reflectivity: Mirror surface with a reflectivity of 85-95% for effective signaling.
Weight: 50-150 grams, depending on size and materials.
Temperature Range: -20°F to 120°F (-29°C to 49°C) for standard models.
Water Resistance: Typically IPX7 or higher for submersion up to 1 meter.
Additional Features: May include sighting holes, ruler markings, or built-in whistles.
