[modeleng] Re: SW board

Hi John

My understanding has always been that it stands for 'Sound Whistle'.

Regards
Ron

----- Original Message ----- 
From: "John Pagett" <john_pagett@xxxxxxxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Saturday, January 12, 2008 9:08 PM
Subject: [modeleng] SW board


>I always thought that the "SW" board on the approach to tunnels etc was for
> "Sound Whistle", but I read something the other day suggesting it was 
> "Short
> Whistle".

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