Note: photos in the carousel show the model in 1/144 scale.  This model has identical features but is slightly smaller.  If you order this product, you will receive the correctly scaled model.
 
Scale: compared to official US Navy drawings, your Revell model kits' true scale is 1/178.  This model fairwater is precisely scaled to match your Revell kit's true scale.
 
Recommended to help build a Balao-class fleet submarine from:
Revell 1/180 scale USS Flasher SS-249
Revell 1/180 scale USS Growler SS-215
Revell 1/180 scale USS Lionfish SS-298
 
This model fairwater is intended to help convert your Revell Gato-class submarine model into one of 122 World War Two-era Balao-class submarines, successor to the Gato-class.  The Balao-class had a smaller and differently shaped fairwater (sail/conning tower) than the earlier Gato-class, although the hull was externally nearly identical.  
 
This model has features specific to USS Lionfish SS-298 as it appeared circa 1945 with lengthened "cigarette deck" aft.  The real USS Lionfish is presently preserved as a museum ship at Fall River, Massachusetts.  Some details appear differently today than they did during World War Two.  This model can be adapted to other boats of the class with similar features.
 
This model was designed from official US Navy drawings of the real USS Lionfish SS-298.  

A fairwater for sistership USS Balao SS-285 is available separately (click here).
 
Although sometimes boxed and marketed as the Balao-class submarine USS Lionfish SS-298, the Revell kit is a reasonable representation of the earlier Gato-class submarine, but not a Balao-class submarine.  The Revell kit was originally released in 1971 as the Gato-class submarine USS Flasher SS-249 (click here) and later as Gato-class submarine USS Growler SS-215.  In 1988, Revell re-released their Gato-class kit erroneously marketed as the Balao-class boat USS Lionfish SS-298.  The real USS Lionfish has been a popular attraction on permanent display as a memorial at Battleship Cove in Fall River, Massachusetts since 1973.
 
When Revell marketed their Gato-class kit as USS Lionfish, they did not change any of the parts.  Revell simply changed the box and the instruction sheet.  The kit inside that box has the original Gato-class fairwater which does not represent the Balao-class' smaller fairwater.  The Revell kit's fairwater is simply wrong for any Balao-class boat.

This 3D-printed model was designed from official US Navy drawings.  The Balao fairwater is not the same size and shape as the larger Gato fairwater.  The Balao fairwater is much shorter in height and length, especially at the aft end.  Some adjustment of your plastic Gato kit's deck part such as scribing planking will be necessary for best fit.
 
For excellent submarine references, click here.

Although details varied widely between boats, the periscope shears and radar mast configuration depicted by this model, or similar, is believed to have been fit to the following Balao-class boats, among others:
SS-289 Capelin
SS-290 Cisco
SS-292 Devilfish
SS-293 Dragonet
SS-294 Escolar
SS-295 Hackleback
SS-298 Lionfish
SS-299 Manta
SS-301 Roncador
SS-302 Sabalo
SS-304 Seahorse
SS-306 Tang
SS-307 Tilefish
SS-309 Aspro
SS-310 Batfish
SS-324 Blenny
SS-329 Chub
SS-332 Bullhead
SS-337 Carbonero
SS-341 Chivo
SS-342 Chopper
SS-394 Razorback
 
© Model Monkey LLC. This 3D-printed product may not be copied or recast.

From military.wikia.com: "The Balao-class was a successful design of United States Navy submarine used during World War II, and with 122 units built, the largest class of submarines in the United States Navy. An improvement on the earlier Gato-class, the boats had slight internal differences. The most significant improvement was the use of thicker, higher yield strength steel in the pressure hull skins and frames, which increased their test depth to 400 feet (120 m). Tang actually achieved a depth of 612 ft (190 m) during a test dive, and exceeded that test depth when taking on water in the forward torpedo room while evading a destroyer."

Museums:
USS Batfish (SS-310) at War Memorial Park in Muskogee, Oklahoma
USS Becuna (SS-319) at Independence Seaport Museum in Philadelphia, Pennsylvania
USS Bowfin (SS-287) at USS Bowfin Submarine Museum & Park in Honolulu, Hawaii
USS Clamagore (SS-343) at Patriot's Point in Mount Pleasant, South Carolina
USS Ling (SS-297) at New Jersey Naval Museum in Hackensack, New Jersey
USS Lionfish (SS-298) at Battleship Cove in Fall River, Massachusetts
USS Pampanito (SS-383) at San Francisco Maritime National Historical Park in San Francisco, California, which played the part of USS Stingray in the movie Down Periscope
USS Razorback (SS-394) at Arkansas Inland Maritime Museum in North Little Rock, Arkansas"