# How do I add collision bulkhead to the ship in the picture?

**URL:** <https://forum.gcaptain.com/t/how-do-i-add-collision-bulkhead-to-the-ship-in-the-picture/45110>\
**Category:** Shipbuilding\
**Created:** [June 13, 2017, 3:48pm UTC](https://forum.gcaptain.com/t/how-do-i-add-collision-bulkhead-to-the-ship-in-the-picture/45110 "2017-06-13T15:48:21Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![hewenhao](https://avatars.discourse-cdn.com/v4/letter/h/e495f1/32.png) [@hewenhao](https://forum.gcaptain.com/u/hewenhao)\
**Post date:** [June 13, 2017, 3:48pm UTC](https://forum.gcaptain.com/t/how-do-i-add-collision-bulkhead-to-the-ship-in-the-picture/45110/1 "2017-06-13T15:48:21Z")

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![](https://us1.discourse-cdn.com/flex016/uploads/gcaptain_maritime_forum/original/1X/7a89ccc8842b3977ae60d0cccf7f2404a799fc21.jpg)

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**Author:** ![cmakin](https://avatars.discourse-cdn.com/v4/letter/c/48db29/32.png) [@cmakin](https://forum.gcaptain.com/u/cmakin)\
**Post date:** [June 14, 2017, 3:00pm UTC](https://forum.gcaptain.com/t/how-do-i-add-collision-bulkhead-to-the-ship-in-the-picture/45110/2 "2017-06-14T15:00:45Z")

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Are we to do your homework for you?

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**Author:** ![hewenhao](https://avatars.discourse-cdn.com/v4/letter/h/e495f1/32.png) [@hewenhao](https://forum.gcaptain.com/u/hewenhao)\
**Post date:** [June 14, 2017, 3:39pm UTC](https://forum.gcaptain.com/t/how-do-i-add-collision-bulkhead-to-the-ship-in-the-picture/45110/3 "2017-06-14T15:39:48Z")

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Does the picture should be improved as it is not easy to distinguish bow  
from stern？ In particular,is it seems that the collision bulkhead  
absent ？

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**Author:** ![Fraqrat](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.gcaptain.com/fraqrat/32/1961_2.png) [@Fraqrat](https://forum.gcaptain.com/u/Fraqrat)\
**Post date:** [June 14, 2017, 8:21pm UTC](https://forum.gcaptain.com/t/how-do-i-add-collision-bulkhead-to-the-ship-in-the-picture/45110/4 "2017-06-14T20:21:57Z")

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![](https://us1.discourse-cdn.com/flex016/uploads/gcaptain_maritime_forum/original/1X/7718a391fa67edf38578c253094541c5cca3f9ba.PNG)

There I fixed it…you’re welcome.

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**Author:** ![Tupsis](https://avatars.discourse-cdn.com/v4/letter/t/e9a140/32.png) [@Tupsis](https://forum.gcaptain.com/u/Tupsis)\
**Post date:** [June 15, 2017, 4:48am UTC](https://forum.gcaptain.com/t/how-do-i-add-collision-bulkhead-to-the-ship-in-the-picture/45110/5 "2017-06-15T04:48:02Z")

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I quickly read through ABS Rules Pt. 3 Ch. 2 Sec. 9 Paragraph 3.1 “Collision Bulkhead” and didn’t find anything ambiguous in it. Since you have a bulbous bow, the reference point needs to be determined as per 3.1.3. If you don’t know the location of the rudder stock, define the rule length based on waterline length at . 85xD and steer clear from the extreme ends of the allowed collision bulkhead location.

What Fraqrat defined above is probably ok. It’s about there.

As for “not easy to distinguish bow from stern”, that’s why the bow is always to the right…

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**Author:** ![hewenhao](https://avatars.discourse-cdn.com/v4/letter/h/e495f1/32.png) [@hewenhao](https://forum.gcaptain.com/u/hewenhao)\
**Post date:** [October 9, 2018, 12:20am UTC](https://forum.gcaptain.com/t/how-do-i-add-collision-bulkhead-to-the-ship-in-the-picture/45110/6 "2018-10-09T00:20:47Z")

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I am not a student，the picture is picked from a book. i used it for a diagram in a manuscript，but editor think it is not clearly.