Page 12 - Mark Gommers "Bowlines Analysis"

Terminology (continued)

Further explorations evolved by Dan Lehman and Constant Xarax include the concepts of
‘Post Eye Tiable’ (PET) and ‘Tiable in the bight’ (TIB). It is theorized that all Bowlines are
PET. In contrast, #1047 (F8 eye-knot) is not PET. The benefit of a PET knot to a climber is
that the rope can be fed through the harness and then the knot can be tied. In contrast, with
#1047 F8, the climber must first tie a knot before feeding the rope through the harness.
Note that the reverse condition also applies – that is, when untying Bowlines, no knot is left
in the rope. For example, when untying #1047 from a harness, a knot will be left in the rope
(#524). This knot must also be untied.

Tying
Untying

ABoK #1010 completed

Bowline is Post Eye Tiable (PET)
The Bowline can be tied in a one
stage tying process – it is not
necessary to form an initial knot.

SPart

Must tie a single SPart #524 remains…
this must also
F8 (ABoK #524) be untied.

before the tail is

fed through the
harness!

Tying Untying

Tail

ABoK #1047 (F8 Eye-knot) ABoK #1047 completed Knot left in rope
When untying #1047, the final
The F8 eye-knot is not PET.
Meaning, you must tie a knot #524 knot must also be untied.
first – before forming the eye.

Page 11 of 59 Bowline Analysis Version 2.7a 16 July 2016 © Copyright Mark Gommers