Diving manual/ very rare, with all the special tech inside.We also have the COMMERCIAL DIVERS OIL RIG TECHINSTRUCTION/GRADUATION MANUAL, usual "ONLY" sold at the commercial diving schools (restricted) for $450.00 by me, at the school to (Student) at about $980.00 plus several charts, tables, printouts, etc.The $450 is a discounted price from 980.00 youpay me today, was at the school. (Course cost is $7500.00 or youdo not get one.) Course length is 3 months.I have lots af commercial gear to go. Let me know.More questions?, then get over here, we'll talk.You are unprepared? no problem.Are you running an EXPEDITION week long in the Upper Graet Lakes?, no problem, we can dive to 240 feet, or used to.[One dive was to 310 ft well done, by team of 4 diversin a two team Zodiacs. That was real fun.]If you are a NOVICE, lets talk, so I can discourage you fromsuch a courageous enterprise, from the start.WE have a 5,000 PSIG scuba compressor for sale also.