anchoredemia
Roll and pitch motion: Definition The concept of stability of a ship is none other than the property that it has of recovering its initial state (upright) when an internal or external element (sea or wind) causes it to lose it. The state of the sea (waves) and the wind cause the ship to lose its initial position, producing in it a … Read more
Installation and disturbances of the nautical needle It is the instrument that indicates the direction in which the boat is sailing, therefore thanks to it we can always know what course we are taking. They are based on the magnetic properties that magnets have to orient themselves by pointing to the magnetic North. It is basically made up of magnets placed … Read more
Definitions a) The word "whistle" means any device capable of producing the required whistle sounds and which complies with the specifications in Annex III of these Regulations. b) The term "short whistle" means a sound of approximately one second's duration. c) The term "long whistle" means a sound of approximately four to six seconds' duration. Sound signals: Equipment … Read more
Scope a) They must be observed in all weather conditions. b) The rules relating to lights must be observed from sunset to sunrise, and during this interval no other lights shall be displayed which might be confused with those described in these Regulations, or which impair visibility or prevent effective surveillance. c) The lights in these rules MUST also be displayed … Read more
10.7.- TOTAL CORRECTION 10.7.1.- Definition It is the angle that the needle north forms with true north. That is, it is equal to the algebraic sum of the dm and the deviation. Ct = dm + Δ 10.7.2.- Calculation from the declination and deviation Once the magnetic declination (dm) is known, through the chart, … Read more
Windlass: Gypsy, clutch and brake The windlass is a machine for raising or lowering the anchor chain and can be moved hydraulically, manually or, more commonly used in recreational boats, by means of an electric motor. The gypsy is a piece that is attached to the drum and has notches in order to hook the anchor into the … Read more
Prevention to avoid a man overboard situation: Safety harness, lighting Among the most effective measures to avoid falls is the safety harness, without forgetting that the deck must have a non-slip surface and that the stanchions must be high and strong, in addition to wearing appropriate shoes. On the other hand, unnecessary trips to the water should be avoided. Read more
Steering wheel with tiller and with wheel It must be taken into account that although the objective of both systems is the same, to steer the boat, that: In steering with tiller: The bow falls in the opposite direction to that in which the tiller is inserted. The fall is faster when the tiller is acted directly on the rudder. It is easier to maintain the … Read more
To be considered a good sailor it is necessary to learn a multitude of techniques and concepts related to navigation. Today we want to focus on the moorings of a boat, fundamental elements that will allow us to dock the boat well. In fact, this concept is one of those that makes up the syllabus of the exam of… Read more
To be an expert in navigation you have to acquire endless knowledge. Coastal navigation is difficult for the navigator, as he must constantly remain precisely positioned on the chart. Although today the precision of electronic devices has favored navigation, there are very effective methods to obtain... Read more