AVAILABLE PUBLICATIONS 
The Navy Department has available the following pub- 
lications concerning the prediction of maximum echo ranges and 
the use of the bathythermograph by surface vessels and submar- 
ines: 
* (a) Restricted, non-registered publication: "Instructions | 
for the Care and Use of the Surface Wesset Bathythermograph 
Types CTB 40080 and CTB 40120". 
* (b) Restricted, non-registered publication: "Installation, 
Operation and Maintenance Instructions for the Model OAM Sur- 
face Vessel Bathythermograph". 
(ec) Confidential, non-registered publication: "Prediction of 
Sound Ranges from Bathythermograph Observations". 
) Sound Ranging Charts of the Oceans - Restricted. 
0.1400 R - North Atlantic Summer, North Atlantic Winter 
0.1401 R - North Pacific Summer, North Pacific Winter 
.0.2600 R - South Atlantic Summer, South Atlantic Winter 
0.2601 R - South Pacific Summer, South Pacific Winter 
0.2603 R - Indian Ocean Summer, Indian Ocean Winter 
4 (e) Bottom Sediment Charts - Confidential and Restricted - 
showing acoustic effect of bottom character in waters less 
than 100 fathoms deep. 
4 (f) Confidential, non-registered publication: "The Use of 
Bottom Sediment Charts". 
* (g) Confidential» non-registered publication: "Calculation 
of Sound Ray Paths Using the Refraction Slide Rule". 
For submarines, the following additional publications can be 
obtained: 
* (a) Restricted, non-registered publication: "Instructions 
ir(@1e qwlalS) Installation, Care and Use of the Submarine Bathytherm- 
ograph Types CTB 40079 and CTB 40131". 
* (b) Confidential, non-vegistered publication: "Use of Sub- 
marine Bathythermograph Observations". 
4 (c) Confidential, non-registered publications: Submarine 
Supplements to the Sailing Directions, for areas of strategic 
importance. 
* Requests should be addressed to the 
Bureau of Ships, Washington, D.C. 
4 Requests should be addressed to the 
Hydrographic Office, Washington, D.C. 
