Dorsal Fin ID

MenuDorsal AR Calc

Measure the distance between points 'O' and 'A' (the red line in the photo above), enter the value in the box below, then click the "Next" button.

Measured length ('O' to 'A'): | 999.9 |

Calculated midpoint: | 8.8 |

Find the midpoint and measure the width of the fin (the yellow line in the photo above), enter the width of the fin into the box below, then click "Next".

Measured length ('O' to 'A'): | 999.9 |

Calculated midpoint: | 8.8 |

Measured width: | 7.7 |

Calculated Aspect Ratio: | 6.6 |

Note the "Calculated Aspect Ratio" value shown above, then click "OK" to return to the question and use that value to answer the question.