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Citizen Nighthawk Series User Manual

Citizen Nighthawk Series
7 pages
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Crown ‘A
(used for setting
time/date functions)
24-Hour Hand (PM Side)
24-Hour Time ‘AM’ Scale
Pilots Slide Rule
Dial Ring (Outer Scale)
Hour Hand
Crown ‘B’
(used for rotating
Pilots Slide Rule
Dial Ring
Minute Hand
24 Hour Hand (AM Side)
Slide Rule
Inner Scale
Date
Second Hand
24-Hour Time ‘PM’ Scale
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Citizen Nighthawk Series Specifications

General IconGeneral
Case MaterialStainless Steel
Case Diameter42mm
Water Resistance200 meters
Band MaterialStainless Steel
CrystalMineral
FunctionsDate, Luminous Hands and Markers
Power Reserve6 months (in total darkness)
MovementCitizen Eco-Drive (solar-powered)

Summary

Nighthawk Series Quick Reference

24 Hour Hand and Sub Dial

Describes the 24-hour hand's function for AM/PM time and its sub-dial correlation for accurate setting.

Crown 'A' Operation

Details the use of Crown 'A' for setting the watch's time and date functions.

Crown 'B' Operation

Explains the function of Crown 'B' in rotating the Pilots Slide Rule Dial Ring.

Date Indicator

Covers the date display and manual adjustment needed for months with fewer than 31 days.

Pilots Slide Rule Dial Ring

Explains the outer scale of the slide rule and its application in flight-related calculations.

Quick Setting Instructions

Navigation Calculator

Calculation of Time Required

Explains how to calculate the time needed to fly a specific distance at a given speed.

Speed (Ground Speed) Calculation

Details how to calculate the ground speed of an aircraft based on time and distance flown.

Flying Distance and Fuel Calculations

Flying Distance Calculation

Demonstrates calculating flying distance based on time and knots.

Fuel Consumption Rate Calculation

Shows how to determine fuel consumption rate from total fuel and time.

Fuel Consumption Calculation

Illustrates calculating total fuel consumed given rate and duration.

Advanced Calculations and Conversions

Maximum Flying Hours

Calculates maximum flight duration based on fuel supply and consumption rate.

Unit Conversion

Explains how to convert between miles, nautical miles, and kilometers.

General Calculation Functions

Multiplication

Demonstrates how to perform multiplication using the slide rule.

Division

Shows how to perform division using the slide rule.

Reading Ratios

Explains how to read ratios between the inside and outside scales.

Square Root Determination

Details the method for finding the square root of a number using the slide rule.

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