Buyer's Guides Searching for additional sources for equipment? Want specifications for a yacht you saw in last months' boating magazine? Buyer's guide software can help with extensive databases of specifications and drawings. Powerboat Guide Yacht brokers Ed McKnew and Mark Parker publish the most popular guide to power boats; now it's available on CD-ROM.  Ideal for brokers and dealers.  Windows® or Macintosh® compatible.   Ordering Information 120373 Powerboat Guide (CD-ROM) $69.95