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Tether or plugin?


Choose the self-rescue plugin TV3E3U for
competitions, to be compliant with race regulations (e.g. ISAF/OSR)
sailing, to be at any time compliant with general safety regulations
reuse existing tethers (inasmuch as they are homologated)

Choose the self-rescue tether TV3E3 for
a single device to secure yourself on deck and for self-rescue

Standard force factor is OK for you ?


It depends on your arms' strength and your weight. With the standard configuration, i.e., 3 loops of straps in each section, 

TV3E3: maximal effort during self-rescue ~ 5 pulls at 42% of your weight.




Test 1: five (5) complete pull-ups, pause between pulls
      X 5 

You can execute 5 pull ups? standard configuration TV3E3 is suitable for you.


Indeed pull ups give a huge safety margin: they correspond to ~ 220% of the required effort.  

Here is a more precise test. It requires gym equipment (may also be realized on your boat with a halyard).


Test 2: five (5) pull downs at ~50% of your weight, pause between pulls.

            X 5 
weight W with sea clothing      weight ~ 50% of W


You can execute 5 pull downs? standard configuration TV3E3 is suitable for you.


Problems with pull downs? choose the version TV3E3L (4 loops of strap).
 
TV3E3L: maximal effort during self-rescue ~ 7 pulls at 35% of your weight.





Standard length of stirrups is OK for you ?


It depends on your size and how high you can step with your usual sea clothing

The length of standard stirrups (140 cm, 110 cm, 80 cm) was determined from anthropometric data and norms on portable ladders. 

See below whether is suits you or not. If needed, use the length adapter to enlarge the stirrups. 

If you have doubts about the following method,  contact Design 4 Sea or your distributor for help. 


Test 3:  stepping with your sea clothing. 
    
                                     Put on your sea clothing   Step as high as possible
                                                                         

DGF = distance ground-foot.
DFH = distance foot-top of head.

DGF 30cm or more, DFH 120 cm or less ? standard configuration TV3E3 is suitable for you.


DFH larger then 120 cm? you need larger stirrups (use the length adapter).
possible causes: your size above average, your sea clothes limit your movements (e.g., sea boots block the ankles) and/ or you have limited hip, knee and/or ankle movement amplitude. 


1) largest stirrup (1.40m, mark "L" on sleeve). Extend the stirrup of D1 = DFH - 120cm
Example: DFH = 135cm, D1 = 135-120 = 15cm


If you can step 30cm + D1, no need to extend the other stirrups.
Example: DGF = 48cm, D1 = 15cm, D1+30 = 45cm, OK.

2) intermediate stirrup (1.10m, mark "M" on sleeve). Extend the stirrup of D2 = D1 + 30cm - DGF
Example: D1 = 15cm, DGF = 35cm, D2 = 15+30-35 = 10cm

If you can step 30cm + D2, no need to extend the last stirrup
Example: DGF = 40cm, D2 = 10cm, D2+30 = 40cm , OK.

3) shortest stirrup (80 cm, mark "S" on sleeve).  Extend the stirrup of D3 = D2 + 30cm - DGF
Example: D2 = 10cm, DGF = 35cm, D3 = 10+30-35 = 5cm.



DGF less than 30cm? your stepping is too short.  Contact Design 4 Sea or your distributor for custom stirrups.




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