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For flat-faced sundial. Gnomon angle should be same as latitude

**Sundial hour angles for 54.8 degrees**

Formula: tan D = (tan t)(sin H) where D is the degrees needed, t is the angle of arc of each hour and H is the latitude.

AM and PM hour angles are the same, deviating from true-north pointing noon line

Hour | Angle |
---|---|

0.5 | 6.14° |

1 | 12.35° |

1.5 | 18.7° |

2 | 25.26° |

2.5 | 32.09° |

3 | 39.25° |

3.5 | 46.8° |

4 | 54.76° |

4.5 | 63.12° |

5 | 71.85° |

5.5 | 80.85° |

6 | 90° |