Take Capitán Deportivo Costero (Chile) Practice Questions - Capitán Deportivo Costero - Licencia Deportiva Náutica de Directemar (Chile) Exam

QUESTION 1 / 25

What is the standard length of one international nautical mile (NM), and why is nautical distance measured along the latitude scale rather than the longitude scale on a Mercator chart?

Choose one answer below.

A1,852 meters; one nautical mile equals one minute of latitude, which remains constant in physical distance, whereas longitude minutes shrink toward the poles✓B1,609 meters; one nautical mile equals one minute of longitude along the equator only✓C2,000 meters; Mercator distortion requires expanding latitude and longitude scales at an identical rate✓D1,852 meters; longitude minutes represent true physical distance while latitude scale is heavily compressed✓

QUESTION 2 / 25

What vertical chart datum is officially utilized by the Servicio Hidrográfico y Oceanográfico de la Armada (SHOA) for soundings (depths) on Chilean nautical charts?

Choose one answer below.

AMean Sea Level (Nivel Medio del Mar - NMM)✓BThe Nivel de Reducción de Sondas (NRS), a low-water reference chosen so that the real depth is normally at least the charted depth✓CMean High Water Springs (Pleamar Media de Sicigias)✓DHigh Astronomical Tide (Nivel Máximo Astronómico)✓

QUESTION 3 / 25

Which fundamental mathematical property makes the Mercator projection the standard choice for coastal navigational charts published by SHOA?

Choose one answer below.

AA straight line drawn between two points represents a line of constant compass heading (rhumb line or loxodrómica)✓BA straight line represents the shortest spherical distance (great circle or ortodrómica) between two points✓CLand areas and ocean surfaces preserve true conformal area scale without any geographical distortion✓DParallels and meridians intersect at variable oblique angles depending on the local latitude✓

QUESTION 4 / 25

A SHOA nautical chart's compass rose indicates a Magnetic Variation (dm) of 5° 30' E in the year 2018, with an annual variation of 6' East (+6'). What is the updated Magnetic Variation to use for navigation in 2026?

Choose one answer below.

A6° 18' E (+6.3°)✓B4° 42' E (+4.7°)✓C5° 36' E (+5.6°)✓D7° 12' E (+7.2°)✓

QUESTION 5 / 25

A skipper plots a True Course (Rv) of 245° on a SHOA chart. If the local Magnetic Variation (dm) is 7° East (+7°), what is the corresponding Magnetic Course (Rm)?

Choose one answer below.

A238°✓B252°✓C245°✓D231°✓

QUESTION 6 / 25

What causes Magnetic Deviation (Desvío del compás - Delta) on board a sports vessel, and how is it determined for navigation?

Choose one answer below.

AThe magnetic fields generated by the Earth's molten core; it is read directly from the charted compass rose✓BThe vessel's own metallic structure, engine, and electrical equipment; it is determined for different headings using a deviation table (tablilla de desvíos)✓CAtmospheric thunderstorm activity and solar radiation; it is updated daily via radio broadcast✓DThe rotational speed and draft of the vessel; it is calculated from the boat speed log✓

QUESTION 7 / 25

A vessel is steering a Compass Course (Rc) of 085°. The vessel's deviation table indicates a Deviation (Delta) of -3° (3° W) on this heading, and the local Magnetic Variation (dm) is +8° (8° E). What is the vessel's True Course (Rv)?

Choose one answer below.

A090°✓B080°✓C096°✓D074°✓

QUESTION 8 / 25

From a vessel steering with a Total Compass Correction (Ct) of -4° (4° W), the navigator takes a Compass Bearing (Dc) of 142° to Punta Corona lighthouse. What is the True Bearing (Dv) to plot on the SHOA chart?

Choose one answer below.

A138°✓B146°✓C142°✓D150°✓

QUESTION 9 / 25

A vessel is steering a True Course (Rv) of 130°. The lookout observes a prominent headland at a Relative Bearing (Marcación - M) of 045° on the starboard bow (+45°). What is the True Bearing (Dv) of the headland?

Choose one answer below.

A175°✓B085°✓C130°✓D220°✓

QUESTION 10 / 25

What is a transit line (enfilación) in coastal navigation, and why is it considered one of the most reliable visual lines of position (LOP)?

Choose one answer below.

AThe visual alignment of two charted conspicuous landmarks in a single straight line, providing an exact line of position independent of compass error✓BThe line connecting the vessel's GPS waypoint with the destination harbor entrance✓CA radar range circle intersecting the 20-meter bathymetric depth contour✓DA single compass bearing taken to a distant lighthouse adjusted for atmospheric refraction✓

QUESTION 11 / 25

When obtaining a coastal position fix using simultaneous cross bearings (demoras cruzadas), what is the ideal angle of intersection between two lines of position (LOPs), and what does a 'cocked hat' (triángulo de error) indicate when three LOPs are plotted?

Choose one answer below.

A90° between two LOPs (or 60°/120° among three LOPs); the triangle indicates minor measurement/compass errors, with the true position usually within the triangle✓B180° between two LOPs; the triangle indicates complete GPS satellite signal corruption✓C30° between two LOPs; the triangle proves that one of the charted landmarks has shifted position✓D0° between two LOPs; the triangle represents the vessel's turning radius during the maneuver✓

QUESTION 12 / 25

When navigating along a coastline with only a single prominent landmark visible, how does a navigator obtain a 'running fix' (demora y distancia navegada con traslado de línea de posición)?

Choose one answer below.

ATake an initial bearing to the landmark, record the time and log reading, advance the initial bearing line parallel along the course and distance run, and intersect it with a second bearing to the same landmark✓BMeasure the water depth twice and take the average of the two soundings✓CMaintain a constant engine RPM and multiply the GPS speed by the water temperature✓DSteer directly toward the landmark until its vertical angle doubles, then reverse course✓

QUESTION 13 / 25

On a SHOA nautical chart, the elevation of a lighthouse structure is stated as 49 meters above Mean High Water Springs. What optical/geometric factor defines its 'geographic range' (alcance geográfico) as seen from the bridge of a small craft?

Choose one answer below.

AThe curvature of the Earth combined with the height of the light and the observer's eye height above sea level✓BThe electrical wattage and luminous intensity of the light bulb alone✓CThe atmospheric visibility coefficient under dense fog conditions✓DThe magnetic variation of the local geographic zone✓

QUESTION 14 / 25

What is the definition of a Dead Reckoning position (Posición por Estima - Pe) in marine navigation?

Choose one answer below.

AA position plotted using only the vessel's True Course steered and distance run through the water from the last known fix, without accounting for current or leeway✓BAn exact geographical fix obtained by differential GPS with satellite augmentation✓CA position established solely by intersecting three visual compass bearings✓DThe predicted arrival position calculated by the coastal harbor master✓

QUESTION 15 / 25

A vessel is steering a True Course (Rv) of 180° with a fresh westerly wind blowing from 270°. The navigator estimates a wind leeway (Abatimiento - Ab) of 5°. What is the vessel's actual True Course through the water (Rva / rumbo con abatimiento)?

Choose one answer below.

A185°✓B175°✓C190°✓D170°✓

QUESTION 16 / 25

A coastal navigator plots a course in an area with a known tidal stream setting 090° at 2.0 knots. If the vessel steers True Course 000° at an engine speed of 8.0 knots for 1 hour, what is the vessel's resulting Course Over Ground (Rumbo efectivo - Ref) and Speed Over Ground (Velocidad efectiva - Vef)?

Choose one answer below.

ARef ≈ 014°, Vef ≈ 8.2 knots✓BRef ≈ 090°, Vef ≈ 10.0 knots✓CRef ≈ 346°, Vef ≈ 6.0 knots✓DRef ≈ 045°, Vef ≈ 16.0 knots✓

QUESTION 17 / 25

According to official Chilean chart standard Carta Nº 1 SHOA, what does a rock symbol surrounded by a dotted danger circle with a depth sounding number inside represent?

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AA dangerous underwater rock (roca sumergida peligrosa) with a known depth over it at chart datum✓BAn emergent island with permanent trees and navigation beacon✓CA designated marine protected reserve where anchoring is prohibited✓DA tidal current observation station with acoustic sensor✓

QUESTION 18 / 25

What is the meaning of the abbreviation 'PA' adjacent to a charted shoal or wreck on a SHOA nautical chart?

Choose one answer below.

APosition Approximate (Posición Aproximada) — the exact geographical coordinates have not been rigorously verified✓BProhibited Anchorage (Fondeadero Prohibido)✓CPilot Available (Práctico Disponible)✓DProtected Area (Área Protegida)✓

QUESTION 19 / 25

A lighthouse description on a SHOA chart reads: 'Gp Oc(3) W 15s 24m 18M'. How should this light characteristic be interpreted by the skipper?

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AGroup Occulting showing 3 eclipses/dark periods, White light, period of 15 seconds, focal height 24 meters, nominal range 18 nautical miles✓BGroup Flashing showing 3 flashes, White light, period of 15 seconds, elevation 24 meters, nominal range 18 nautical miles✓CQuick Flashing 3 times, Green light, 15 minutes duration, 24 miles visibility, 18 meters height✓DFixed light with 3 sectors, White light, 15 seconds period, 24 meters beam width, 18 nautical miles range✓

QUESTION 20 / 25

What is the key difference between the 'Nominal Range' (Alcance Nominal) and the 'Luminous Range' (Alcance Luminoso) of a marine light?

Choose one answer below.

ANominal range is the luminous range under a standardized meteorological visibility of 10 nautical miles, whereas luminous range is the actual visible range under existing local weather visibility✓BNominal range is measured with binoculars while luminous range is seen with the naked eye✓CNominal range applies only during daytime while luminous range applies at night✓DNominal range is determined by Earth curvature while luminous range depends on battery voltage✓

QUESTION 21 / 25

How can a coastal navigator use a bathymetric contour (veril de sonda, e.g., the 20-meter depth line) as a safety line of position during reduced visibility?

Choose one answer below.

ABy maintaining continuous soundings and recognizing when crossing or paralleling the charted depth contour, providing a physical boundary against grounding✓BBy assuming the depth contour replaces all COLREGs steering rules✓CBy matching engine RPM to the sounding depth in meters✓DBy calculating the vessel's speed based on the color of the sea bottom✓

QUESTION 22 / 25

In the official SHOA Tide Tables (Tablas de Marea de la Costa de Chile), how are tidal predictions for a 'Secondary Port' (Puerto Secundario) determined relative to a 'Standard Port' (Puerto Patrón)?

Choose one answer below.

ABy applying published time differences (diferencias de hora) and height differences or ratios (diferencias de altura) to the standard port's predicted high and low waters✓BBy multiplying the standard port's tidal height by the vessel's deadweight tonnage✓CBy adding 12 hours and 25 minutes directly to the standard port's predictions without height correction✓DBy using the secondary port's atmospheric pressure reading instead of tide tables✓

QUESTION 23 / 25

According to the practical Rule of Twelfths (Regla de los doceavos) for semi-diurnal tides with a 6-hour duration, what proportion of the total tidal range rises during the second hour after Low Water?

Choose one answer below.

A2/12 of the tidal range (accumulating 3/12 total by the end of the second hour)✓B1/12 of the tidal range✓C3/12 of the tidal range✓D6/12 of the tidal range✓

QUESTION 24 / 25

A vessel with a maximum draft of 2.2 meters plans to cross a rocky coastal bar with a charted depth (sonda de la carta) of 1.5 meters. The skipper requires a minimum safety under-keel clearance (resguardo bajo la quilla) of 0.8 meters. What is the minimum Height of Tide (Altura de marea) required to cross safely?

Choose one answer below.

A1.5 meters✓B0.7 meters✓C3.0 meters✓D2.2 meters✓

QUESTION 25 / 25

When configuring a marine echo sounder (ecosonda), what is the vital operational difference between setting the display to 'Depth Below Transducer' versus 'Depth Below Keel'?

Choose one answer below.

ADepth Below Transducer measures water from the hull-mounted sensor downward, whereas Depth Below Keel offsets for the vessel's draft to show true remaining clearance beneath the lowest point of the keel✓BDepth Below Transducer includes the height of the mast while Depth Below Keel includes tide height✓CDepth Below Transducer works only in freshwater while Depth Below Keel works only in seawater✓DDepth Below Transducer displays radar range while Depth Below Keel displays GPS speed✓