
Navigation Rules - SKU 125
ID: #585923
Description
Any boat owner or ship captain knows there are many navigation rules and keeping them straight can be a challenge. Used by the US Coast Guard, US Coast Guard Auxiliary and US Power Squadron, the Davis Instruments Navigation Rules card is a handy way to look up what you need quickly. This Navigation Rules Quick Reference Card includes the US Buoyage System, Inland and International Rules, Right-of-Way, Lights, Sound Signals, and Bridge Signals. The card also includes zones of approach, distress signals, how to recognize lights of different ships and passage signals at night, and what to do if you are in doubt of a rule under certain circumstances. The information on the card is presented in a way that is legible and concise. Colors and shading help separate the different sections of information, making it easy to find. The Navigation Rules Card is full color on both sides, and it is three-hole punched for a binder or bulkhead mounting. It’s also weatherproof and made from durable plastic, allowing it to withstand anything that comes your way. The Navigation Rules Quick Reference Card measures 8 ½ × 11 inches (22 × 28 cm) . Highlights Click here to learn more about the product. A proven navigation tools used by the US Coast Guard, US Coast Guard Auxiliary and US Power Squadron. Navigation Rules feature US. Buoyage System, inland and international rules, right-of-way, lights, sound signals and bridge signals. Measures 8 ½ × 11 inches (22 × 28 cm). FAQs Click here to view popular questions and answers about the product. What Are the Navigation Rules? The navigation rules are designed to help avoid a collision at sea. The information contained on the Navigation Rules Card is that which is considered critical to safe passage for all vessels. There are 72 rules in all that were developed by the Intergovernmental Maritime Consultative Organization (IMCO), which was later renamed to the International Maritime Organization (IMO). The rules of navigation are similar to the rules of the road when driving a car. They are meant to provide consistency so everyone can work to help avoid a collision. There are many nuances to the rules that must be understood before operating a craft. The most important rule is known as “Rule 7,” which addresses what to do when the risk of collision is present. Determining whether a risk of collision exists is key: the prevailing weather and circumstances can be used to determine if a risk is present. If in doubt, it is always suggested that you act as if the risk is present. Knowing these rules is the first step to the safe operation of your vessel. What is the Most Important Navigation Rule? Three rules are considered the most important to help prevent collisions. The first is that at a bare minimum, you should have a proper lookout. The second is that you should always operate your vessel at a safe speed. The third is that you should always give right-of-way when in doubt. It is always suggested that you follow these rules, but if a collision is imminent, it is acceptable to break them if it means avoiding an accident. Safety and protecting human lives should always come first. You should also use a compass to check the bearing of any neighboring vessel. This means checking them frequently because they can change bearings, and you must be continually vigilant. You should also be able to recognize when you are the stand-on or give-way vessel. It is always the duty of the give-way vessel to avoid a collision.
Price
$14.99
Last Updated
9 August 2026, 16:37 UTC
Store Information
physical store
Location
More from Tech Instrumentation
View all
9351 Pan and Vessel Clamp (Package of 10)
$1.21
Pan/Vessel Clip Cooper-Atkins Model 9351 Stainless Steel Pan/Vessel Clamp 37-2D for 1/8" Diameter Stem Thermometer. Sold in packages of 10 clips. Dimensions 1/8" diameter bi-metals Material Stainless Steel

480836 EMF Strength Meter - 3.5GHZ RF
$253.16
480386 High Frequency measurement for EMF (50MHz to 3.5GHz) The Extech 480386 RF EMF Strength Meter monitors high-frequency radiation in the 50MHz to 3.5GHz range. It's ideal for mobile phones, cell phones, base stations, locating RF hotspots, wireless network (Wi-Fi) RF detection, RF "Electrosmog" detection, and microwave leakage. This high-frequency RF meter features non-directional measurement with 3-channel (triaxial) measurement probe, Max Hold and Average functions, and manual store/recall of up to 99 data sets. In addition, there is an audible alarm with a user-selectable threshold. The meter comes complete with a 9V battery and carrying case. Features Ideal for EMF measurements of mobile/cell phones, base stations and microwave leakage Measurement optimized for 900MHz, 1800MHz and 2.7GHz Non-directional (isotropic) measurement with three-channel (triaxial) measurement probe Max Hold and Average functions Manual store/recall up to 99 sets Level exceed audible alarm with user selectable threshold Complete with 9V battery and carrying case Specifications Specifications Range Sensor Type Electric Field Frequency Range 50MHz to 3.5GHz (Measurement optimized for 900MHz, 1800MHz and 2.7GHz) Units of Measure mV/m, V/m, μA/m, mA/m, μW/m 2 , mW/m 2 , W/m 2 , μW/cm 2 , mW/cm 2 Measuring Ranges 20mV/m to 108.0V/m 53μA/m to 286.4mA/m 1μW/m 2 to 30.93W/m 2 0μW/cm 2 to 3.093mW/cm 2 Resolution 0.1mVm, 0.1mA/m, 0.1mW/m 2 , 0.001mW/cm 2 Audible Alarm Adjustable threshold with On/Off Memory Manual store/recall of 99 sets Dimensions 9.3 x 2.4 x 2.4" (237 x 60 x 60mm) Weight 7oz (200g) UPC: 707223185377 EAN: 5053252182180

445703 Extech Big Digit Hygro-Thermometer
$46.85
445703 1" Digits on super large LCD This Big Digit Hygro-Thermometer has 1 in. digits on a super large LCD. It simultaneously displays humidity from 10 to 99% and temperature from 14 to 140°F or -10 to 60°C. Accuracy is ±5%RH and ±1.8°F/±1°C. Maximum/minimum with reset function. Complete with stand, wall mounting bracket and 1 AAA battery. Features Max/Min with "reset" function Humidity: 10 to 99%RH Temp: 14 to 140°F or -10 to 60°C Accuracy: ±5%RH; ±1.8°F, ±1°C Specifications Specifications Range Humidity range 10 to 99%RH Basic RH accuracy ± 5% (25 to 80%) Temperature range 14 to 140°F (-10 to 60°C) Basic Temperature Accuracy +/-1.8F/1°C (14 to 122°F) Dimensions 4.3 x 3.9 x 0.78"(109 x 99 x 20mm) Weight 6oz (169g)

TL360W/TL100 Alligator Clip Test Leads
$5.60
TL360W All Weather Test Leads Flexible soft leads Ideal for cold months Medium alligator clips Insulated boots Specifications: TL360W Volts: 300V Amps: 10 18 Gauge Wire Length: 36" Weight: 0.26 lb.

ST400 Economy Screwdriver Tester
$0.49
Discover the compact ST400 Economy Screwdriver Tester that doubles as a pocket screwdriver with built-in voltage detection. This versatile tool clips conveniently to your shirt pocket while providing reliable AC voltage testing from 90-250V. Essential for electricians and DIY enthusiasts who need quick voltage verification without bulky equipment. Includes battery for immediate use.

CT220-51 Bimetal Pocket Thermometers
$86.13
12-Pack of Bimetal Pocket Thermometers 1" dial 5" stem with calibration sheath. 12 units packed in self merchandising display box. Temperature Range 0 ° to 220 °F Temperature Accuracy ±2 °F Housing Material Stainless Steel Dial Diameter 1" / 2.54cm Shaft Length 5" / 12.7cm Weight 0.7oz / 19.8g