# Title 46

## SECTION 172.135

### 172.135 Extent of damage.

§ 172.135 Extent of damage.For the purpose of § 172.133 -

(a) Design calculations must include both side and bottom damage, applied separately; and

(b) Damage must consist of the penetrations having the dimensions given in Table 172.135 except that, if the most disabling penetrations would be less than the penetrations given in Table 172.135, the smaller penetration must be assumed.

Table 172.135 - Extent of Damage

Collision Penetration | |

Longitudinal extent | 0.495L 2/3 or 47.6 feet (( 1/3)L 2/3 or 14.5m) whichever is shorter. |

Transverse extent
^{1} |
B/5 or 37.74 feet (11.5m)
^{2} whichever is shorter. |

Vertical extent | From the baseline upward without limit. |

Grounding Penetration At the Forward End But Excluding Any Damage Aft of a Point 0.3L Aft of the Forward Perpendicular | |

Longitudinal extent | L/10. |

Transverse extent | B/6 or 32.81 feet (10m) whichever is shorter. |

Vertical extent from the baseline upward | B/15 or 19.7 feet (6m) whichever is shorter. |

Grounding Penetration At Any Other Longitudinal Position | |

Longitudinal extent | L/10 or 16.41 feet (5m) whichever is shorter. |

Transverse extent | 16.41 feet (5m). |

Vertical extent from the baseline upward | B/15 or 19.7 feet (6m) whichever is shorter. |

^{1} Damage applied inboard from the
vessel's side at right angles to the centerline at the level of the
summer load line assigned under Subchapter E of this chapter.

^{2} B is measured amidships.