Sight Calc 2.0

Sight Calc 2.0

NUVOCOM INCORPORATED – Commercial – iOS
out of 6 votes
Latest Version
2.0
Safe to install

Revolutionize Your Vision with Sight Calc

Minh Ong

Sight Calc is a powerful application designed to simplify and enhance the process of calculating visual acuity and determining prescription requirements for eyeglasses and contacts.
image/svg+xml 2025 Editor's Rating
image/svg+xml EXCELLENT User Rating

Sight Calc is a specialized calculator designed for calculating sight reductions using the "Law of Cosines" method. This tool does not rely on Nautical Almanac data, requiring users to calculate the Local Hour Angle (LHA) and declination beforehand, along with determining an approximate latitude. It is tailored for students studying celestial navigation, particularly in programs like the Celestial Navigation courses offered by the United States Power Squadrons®. For those unfamiliar with sight reductions, valuable resources are available from the United States Power Squadrons® at www.usps.org. Specifically, this calculator complements Form SR96a found at www.usps.org/eddept/n/files/sr96a.pdf.

Inputs can be provided in two formats:

  • Degrees on the left column and minutes on the right column.
  • Decimal degrees (e.g., 44.48833).

Sight Calc will guide users through entering six numbers sequentially:

  • LHA (degrees)
  • LHA (minutes)
  • Latitude (degrees)
  • Latitude (minutes)
  • Declination (degrees)
  • Declination (minutes)

In version 2.0, values can be entered in any order. The calculated values for Hc, Z, and Zn are updated continuously.

Ensure to enter North Latitude as a positive number and South Latitude as a negative number. Sight Calc automatically considers the absolute value of Latitude in the Law of Cosines formula but requires the hemisphere for calculating azimuth (Zn). Similarly, enter positive values for Declination if North and negative if South. Note that this differs from version 1.x of Sight Calc.

If conducting repeated calculations with some unchanged numbers, input only the updated values. To reset all entries at any point, press "C" to clear all data. The "CE" key removes the current entry. Optionally, use the "o" key to convert minutes to decimal degrees, which adds to the degrees field and clears the minutes field, without affecting calculations.

Feedback on bugs or suggestions can be shared at: [email protected].

Overview

Sight Calc is a Commercial software in the category Education developed by NUVOCOM INCORPORATED.

The latest version of Sight Calc is 2.0, released on 07/30/2024. It was initially added to our database on 07/30/2024.

Sight Calc runs on the following operating systems: iOS.

Users of Sight Calc gave it a rating of 5 out of 5 stars.


Minh Ong

Minh Ong

I'm Minh, a software engineer and author with a passion for exploring and writing about the latest in software and technology. With my experience in software development and a specialization in software updates and content creation, I bring a deep understanding of the tech landscape to my reviews and articles. My focus is on providing you with comprehensive insights into general software topics and the latest industry news.

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