# Author page: nautica

### Fix position bearing and vertical sextant angle bearing and vertical sextant angle 2

As soon as you have measured the distance to the lighthouse, in our case 1.3 nautical miles, note the time. Let’s assume it is 1000 hours. Immediately, take a bearing using the hand held compass. Lets assume that after applying the...

### Fix position line or fix at night, using light rising or dipping steps to be taken

Here we will see how you can obtain a position line or a fix at night, using a light rising or dipping on the horizon. Let’s assume you approach a charted light at night. – When you first see the light take a bearing on it with the...

### Fix position line or fix at night, using light rising or dipping using tables formula plotting

Using the almanac’s table, enter with the height of eye and find the distance A. For example, for 5 feet the distance A is 2.57 nm. Then enter with the height of a light and find the distance B. For example, for 140 feet the distance B is...

### How to shape course

How to Shape a course. Let us assume that we wish to sail from A to B and that A is the departure point and B is the arrival point. Using your parrellel ruler and a pencil draw a line joining the two points A and B. This line is the track you...

### Allowance for leeway 1

After taking into account the effects of the tidal set and drift, another factor has to be considered: the wind. The effect of the wind is called Leeway. When you experience strong wind from abeam, you will have to allow for leeway. Leeway is the...

### Allowance for leeway 2

In this example, your boat has a compass heading of 090 degrees, so it follows that the reciprocal heading is 270 degrees – 090 degrees plus 180 degrees. The reading of the boats wake by hand bearing compass is 265 degrees. The difference...

### Allowance for tidal streams 1

In order to allow for the set and drift of the tide and to calculate the Course to steer – we begin as follows We will assume that our Ground Track is 045 degrees true. Draw in the ground track A – B and mark it with two arrow heads...

### Allowance for tidal streams 2

Let’s now consult the “Tidal Levels Table” which is located on the chart. As we can see, the spring tidal range in Portsmouth is 4.4 meters high, MHWS (Mean High Water Springs), 4.4 meters minus MLWS (Mean Low Water Springs)...

### Allowance for tidal streams 3

To allow for set and drift of the tide firstly we will apply the tidal set of 115 True degrees from point A. We place the parrallel ruler on the 115 degree line on the compass rose and then transfer to point A and draw a line. Using the dividers...

### Introduction

Distress signals are used when a boat or a crew member are in grave and immenent danger and require immediate assistance. Several devices can be used to attract the attention of possible rescue units: a radio, an EPIRB, a radar transponder...

The most common way of sending a distress signal is by radio. Modern radios conform to the GMDSS (Global Maritime Distress and Safety System). GMDSS is an international system that uses terrestrial and satellite technology and ship board radio...

### Disstress pyrotechnics

Distress pyrotechnics come in various types: handheld, buoyant, or as parachute rockets. The red parachute rocket is designed for long – range signaling. During the day the visibility of the flare is up to 8 nautical miles and at night up...

### Epirb

Another very important aid to one – way radio communication is the EPIRB. EPIRB stands for Emergency Position Indicating Radio Beacon. The EPIRB transmits the distress alert to a satellite. The satellite locates the EPIRB’s position...

### Sart

SART stands for Search and Rescue Transponder. It is a device for locating ships or their survival craft in distress. The SART operates in the 9 GHz frequency band – generating a series of dots when being interrogated by a search craft with...

### Signaling flags

When in sight of another vessel and no flares or radio are available you can use the signaling flags to call attention to a distress situation. If you require assistance you can use the Code Flag “Victor”. Hoist the Code Flag...

### Epirb

Другой очень важный прибор – односторонняя радиосвязь EPIRB. EPIRB работает как радиомаяк, указывающий на чрезвычайное положение. EPIRB передает сигнал бедствия на спутник. Спутник определяет позицию EPIRB и передает информацию на станцию...

### Sart

SART означает – транспондер поиска и спасения (Search and Rescue Transponder). Это устройство для определения местоположения судов или его спасательных шлюпок (плотов), терпящих бедствие. SART работает в полосе частот 9 ГГц –...

### Mayday call

Start a MAYDAY CALL procedure as follows: Check that the main battery switch is on; and switch the radio to a high power setting. select channel 16 on VHF or 2182 kHz on an MF transmitter. When you use the MF transmitter the distress message...

### Introduction

Fire prevention is the best way to fight a fire. Therefore it is important to know what may cause a fire, and where it could start. The most common areas where fires originate are the galley, the electrical panels and the engine room. Possible...

### Vital tips 1

Good housekeeping is necessary in order to prevent a fire. Here are some vital tips: 1. Maintain a stringent non-smoking policy. 2. Keep flammables, such as clothing and paper, away from radiators. 3. Be sure small appliances are unplugged when...