Boating Knowledge Base

Have a sailing question? Access NauticEd’s sailing and boating knowledge base, and gain in-depth answers to your sailing questions. If you’re interested in powerboating, visit our new powerboating blog.

Coast Guard rescue helicopter with a crew member performing a daring sea operation in clear blue skies.

Sailing Personnel Emergencies

As the skipper of a vessel, you are expected to be able to handle situations thrust upon you at a moment’s notice. Many of these situations are boat-related issues, but there are also crew injury issues for which you should be prepared to assess and handle at least enough until professional assistance arrives.
October 16, 2023/by Grant Headifen
Sailboat and motorboat on calm sea, aerial view. Peaceful ocean cruising scene.

Sailboats Under Power

A Sailboat Under Engine Power is a Power-Driven Vessel Rule 3(c) The term “sailing vessel” means any vessel under sail provided that propelling machinery...
August 30, 2023/by Grant Headifen

Keeping the Telltales Flying Steady

As a sailor we are doing one of two things when it comes to sail trim, either holding a course or trimming to our sails...
August 24, 2023/by Grant Headifen

Sail TellTales

"Telltales" attached to the sail in strategic positions to "tell" us what the wind is doing at that exact location.
August 11, 2023/by Grant Headifen
Couple relaxing on sailboat deck, enjoying sunny day on turquoise waters. Dream yachting escape in paradise.

Why Anchor?

There are many reasons for anchoring your boat...
October 20, 2023/by Grant Headifen
Comparison of masthead and fractional rig sailboats with labeled diagrams showing sail positions.

Mast Head and Fractional Rigging

There are two variations on the standing rigging set up: Masthead and Fractional. On masthead rigs, the attachment point for the sidestays (shrouds), forestay, and backstay (if they exist) is at the top of the mast.
October 15, 2023/by Grant Headifen
Sailboat cutting through ocean waves, showcasing the bow's sleek design and dynamic sailing movement.

Maintaining a Lookout

The Rule Every vessel shall at all times maintain a proper look-out by sight and hearing as...
August 28, 2023/by Grant Headifen
Sailboat and motor yacht on open sea, aerial view, showcasing a serene maritime adventure on calm waters.

Crossing Situations Nav Rules

The Rule 15 (a) when two power-driven vessels are crossing so as to involve risk of collision, the vessel...
August 24, 2023/by Grant Headifen
Group of people planning a sailing route with a map and notes in a cozy room, discussing navigation strategies.

The Nautical Chart

Safely maneuvering a vessel while using positions derived from various coastal and near coastal sources is called coastal navigation.
October 24, 2023/by Grant Headifen
Perko marine battery switch, red casing, marked OFF and ALL, used for managing dual battery systems on boats.

Sailboat Engine and House Systems

Perhaps the most important use of DC power on a vessel is for starting the engine. Considerable power is needed for this task and if the engine does not start immediately...
October 19, 2023/by Grant Headifen
Yellow marine battery charger, TrueCharge 20+ model, designed for efficient onboard 12V power management.

Sailboat Battery Charging

Like a water bucket, batteries have a specific storage capacity and must be refilled/recharged when their contents of energy are depleted.
October 20, 2023/by Grant Headifen
Sailboat anchored in serene blue water near rocky coast, ideal for sailing adventures and peaceful escapes.

Anchoring

Anchoring is not simply throwing a “hook” and letting out a line. However, after watching some sailors, this seems to be their theory. Successful anchoring requires a plan considering all the factors.
October 24, 2023/by Grant Headifen
Satellite image of hurricane approaching Caribbean islands, highlighting storm path critical for sailing safety.

Weather Predictions

While we have touched on weather concepts in this Module, no one can expect you to be a meteorologist (unless you are one) and do a good enough job at predicting the weather with enough quality to guarantee your safety.
October 13, 2023/by Grant Headifen
Diagram of a sail with terms: head, luff, leech, foot, tack, clew, jibsail, jibsheet, fairlead, and geometric center.

Fairlead Control

The fairlead is the first control device that the jib sheet passes through on its way back to the cockpit. You can move the fair lead forward or backward.
August 30, 2023/by Grant Headifen
West Marine deep cycle battery, Group 31, for reliable marine power and extended 105 amp hours performance.

Marine Batteries

The source of DC power is usually one or more marine-grade batteries, normally 12 volts each. They are similar to automobile batteries, except sturdier—and of course more expensive.
October 18, 2023/by Grant Headifen
Sailboat deck with installed solar panels, capturing sunlight for sustainable energy on the water.

Topping Up your Energy on a Sailboat

There are several methods to top-off your energy on a sailboat.
April 14, 2024/by Grant Headifen
Torqeedo Power 48-5000 lithium battery for electric sailboats, dimensions: 23x10x8.6 (577.5x253x218 mm).

Available Energy Stored in a Battery

You don’t actually run all of the electron charge out of a battery when it is considered empty.
April 13, 2024/by Grant Headifen

Electronic Navigation

We are well into the 21st century. Chances are that within 30 feet (10 meters) of you right now there are 2-3 GPS-enabled potentially lifesaving devices...
October 20, 2023/by Grant Headifen
Schematic of boat bilge pump system with battery, manual and float switches, showing hull and water levels.

Bilge Pumps on a Charter Boat

Boats have two types of pumps to empty bilge water; electronic and manually operated. 
April 5, 2024/by Grant Headifen
Diagram of a Yanmar marine diesel engine with labeled parts: fuel filter, coolant filler cap, oil dip stick, belt, water pump.

Sailboat Diesel Engine Operation

As noted earlier, diesel engines are sturdy and highly reliable, and operating them today is straightforward.
October 14, 2023/by Grant Headifen
Sailboat anchored by rocky cliffs in serene waters, under a clear sky, perfect for sailing adventures.

Anchoring with multiple anchors

Setting multiple anchors has multiple advantages. It reduces swing, reduces the holding load required by each anchor, and can act as a backup.
April 13, 2024/by Grant Headifen
Top view diagram of a sailboat hull showing water flow direction and pressure points for optimized sailing performance.

Rudder Force with Spring Lines

The rudder can be a big help because it can change the direction of the thrust force.
April 29, 2024/by Grant Headifen
Diagram comparing lift and drag forces on fabric and winged sails, illustrating aerodynamic efficiency differences.

Winged Sail Vector Diagrams

Sail and Winged Sail Wind Force Vector Diagrams. And it's highly relevant right now because of the America's Cup AC45 catamarans using winged sails.
August 26, 2023/by Grant Headifen
Compact marine generator with dimensions 36x22x23 and weight 600 lbs., ideal for sailing power needs.

Sailboat Generator or Large Battery Bank?

Dedicated electric generators on board sailboats are usually only reserved for large sailboats because of their weight and size. Unless there is a desire for large amounts of electricity...
October 23, 2023/by Grant Headifen

Last updated on December 6th, 2024