Name/Hull Nbr                          Class                                           Conversion Yard/Year

USS Odax (SS484)                    Tench                                         Portsmouth/1947                                     

USS Pomodon (SS486)             Tench                                         Mare Island/1947                                    

Conversion Notes

Externally

-Deck guns and associated containers were removed.

-Entire bridge/shears structure was streamlined to reduce drag.

-The periscope and radar mast support structure was enclosed

-The faired structure which now contained the Conning Tower and mast support was now

  called the "Sail."

-The top of the sail was bulged out to the side to make room for SV-radar screen.

-Capstains and deck cleats were made retractable and deck rail stanchion supports were

  inset in the deck.   All deck railings were removed when the boat rigged for dive.

-The Fleet Boat bow was was removed and a rounded bow replaced it.  The "Guppy Bow."

Internally

-Ammunition magazine was removed from under the galley and the chill and freeze boxes

  were moved to the after battery upper level.

-Battery power was increased with installation of 4 126 cell batteries.  One and one-half of

  the batteries were put in the forward well in the lower level of the forward battery.  One-

  half of a battery was put into the forward end of the pump room.  Two complete batteries

  were placed in the after battery well.

-The battery cells (Gupy Battery) had more, thinner plates and would generate higher amps

  for a longer time.  However, this battery had a shorter life span, longer charging time,          and required cooling water to be circultated through the battery terminals and termination    bars

-Sonar was increased to include the BQR-2 or 2A with hydrophones mounted under the

  forefoot in a chin mount and inboard electronics housed in the forward torpedo room.

-Two or four high speed motor and reduction gear configuration were replaced by slow

  speed motors. 

-The batteries could be connected in series or parallel and the combination possible from

  this arrangement gave a wide speed range.

-All open front switchboards were replaced with enclosed units.

-120 volt 60 hz AC and 120 volt 400 Hz electrical systems were introduced for lighting and

  electronics.