Page 52: of Maritime Reporter Magazine (June 1986)

Offshore Service Vessels, Tugboat

And Inland Towboat Fleets

It is estimated there are ap- proximately 10,000 self pro- pelled tugs, towboats and off- shore service vessels in the

U.S. fleet.

Add to the above 10,000 tugs, towboats, and offshore support vessels, the balance of the United States shallow draft self propelled fleet con- sisting of 11,000 ferries, patrol boats, dredges, pilot boats, fire boats, small harbor tankers, etc. and the number of docu- mented small vessels in the

U.S. self-propelled fleet (5- 1000 gross tons) totals ap- proximately 21,000 shallow- draft vessels.

NOTE: These tables do not include all shallow-draft vessels, i.e. ferries, patrol boats, fire boats, dredges, commercial fishing boats, etc. are not included.

The figures in these shallow draft tables are conservative as it is not possible to obtain data on every tug, towboat and offshore support vessel in the United States fleet (a limited number of smaller and/or individu- ally owned boats may not be in- cluded).

Source: Statistics courtesy of Fleet

Data Service, P. 0. Box 2576, Na- cogdoches, TX 75963. Telephone (409) 569-0375.

Similar tables can be generated on specific segments of the fleet on a

Statistical Summary

The following statistical tables summarize the 1310 tugs in the active American fleet at the end of 1984.

Three specific vessel types have been identified and tabulated sepa- rately. These are anchor-handling tugs (AT), tugs used with dedicated tug/barge units (IT), and tugs in ship-handling or harbor service (HBR). The remaining 776 tugs are not equipped with deck gear for anchor-handling service, fendering for ship-handling service, or special barge connectors for ITB service.

These 776 tugs are in general towing service.

The inventory has been tabulated by year built and horsepower ranges. It should be noted that these

HP ranges are based upon manufac- turer's ratings for continuous duty. [Tables continue on page 54]

Statistical Summary

The following tables summarize the

American-owned offshore service vessel fleet as it existed at the end of calendar year 1985. Tables have been provided showing the break- down of the fleet by LOA by year built and by horsepower by year built for each of the major vessel types. The final table shows the breakdown of the entire fleet by ves- sel type and year built. Each of these tables represents the available fleet at year end. Each includes the known operational fleet plus vessels temporarily laid up, vessels in un- known fleets, and completed by un- sold shipyard stock. Vessels re- moved from the fleet during 1985 are not included. custom basis. Contact James O.

Covington, Fleet Data Service,

P. 0. Box 2576, Nacogdoches TX 75963. Telephone (409) 569-0375 for further details of information avail- able.

AMERICAN OFFSHORE SERVICE VESSEL INVENTORY

Year-end 1985

VESSEL TYPES 150-ft LOA and Larger 60- to 149-ft LOA

GRAND

TOTAL YEAR BUILT SU AS TS GE MISC Total CREW UTIL LB MISC Total

Unknown 0 0 0 4 1 5 1 6 12 5 24 29

Pre-60 0 0 0 0 0 0 5 31 0 12 48 48

I960 0 0 0 0 0 0 1 0 0 0 1 1 1961 0 0 0 0 1 1 2 0 0 1 3 4 1962 0 0 0 0 1 1 4 3 0 1 8 9 1963 0 0 0 0 0 0 4 12 0 1 17 17 1964 1 0 0 2 0 3 3 15 0 4 22 25 1965 8 0 0 2 1 11 12 24 0 8 44 55 1966 15 2 0 5 4 26 11 25 0 8 44 70 1967 11 1 0 2 3 17 8 9 0 0 17 34 1968 13 3 0 2 2 20 13 5 0 3 21 41 1969 19 4 0 2 0 25 20 3 1 2 26 51 1970 7 10 2 3 5 27 26 9 1 0 36 63 1971 11 9 4 0 3 27 14 7 0 0 21 48 1972 20 3 7 2 0 32 16 18 0 1 35 67 1973 22 3 17 3 4 49 22 16 1 0 39 88 1974 19 2 40 4 1 66 21 18 2 2 43 109 1975 15 3 35 1 2 56 16 14 0 1 31 87 1976 15 1 28 4 5 53 27 24 5 2 58 111 1977 31 5 16 2 4 58 29 29 4 1 63 121 1978 40 2 23 4 5 74 49 58 13 3 123 197 1979 49 8 18 3 4 82 47 76 13 3 139 221 1980 45 5 10 7 6 73 82 75 13 5 175 248 1981 56 12 9 11 5 93 79 110 16 3 208 301 1982 72 18 42 12 1 145 35 42 12 3 92 237 1983 20 12 32 3 7 74 8 8 3 2 21 95 1984 10 0 7 3 2 22 6 9 4 0 19 41 1985 3 1 5 3 1 13 17 8 4 0 29 42 1986 0 0 4 2 2 8 1 0 0 0 1 9

TOTAL 502 104 299 86 70 1061 579 654 104 71 1408 2469

AMERICAN-OWNED OFFSHORE, COASTAL & HARBOR TUGS

Year-end 1984

Vessel Types

YEAR MISC AH HBR ITB

BUILT TUGS TUGS TUGS TUGS TOTAL

UNK 6 8 3 0 17

Pre-60 262 1 130 2 395 1960 4 0 8 0 12 1961 9 0 6 0 15 1962 7 1 3 0 11 1963 8 1 4 0 13 1964 17 1 2 0 20 1965 27 2 8 0 37 1966 29 13 6 0 48 1967 39 8 4 2 53 1968 28 5 5 0 38 1969 16 11 7 1 35 1970 30 11 6 1 48 1971 11 7 3 1 22 1972 13 7 1 1 22 1973 16 5 3 2 26 1974 16 17 2 1 36 1975 35 30 7 5 77 1976 40 22 5 4 71 1977 39 9 2 4 54 1978 24 10 3 2 39 1979 19 6 3 4 32 1980 15 3 16 2 36 1981 27 19 12 6 64 1982 30 12 9 12 63 1983 8 7 6 0 21 1984 1 0 3 1 5

Totals 776 216 267 51 1310

HARBOR TUGS

Year-end 1984

Total Continuous Horsepower

Under 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500

YEAR BUILT UNK 500 999 1499 1999 2499 2999 3499 3999 4499 4999 5499 5999 6499 6999 TOTAL

UNK 0 0 1 0 1 0 0 0 1 0 0 0 0 0 0 3

Pre-60 1 9 9 50 34 20 3 2 1 0 0 0 0 0 1 130 1960 0 0 0 0 7 1 0 0 0 0 0 0 0 0 0 8 1961 0 0 0 1 1 4 0 0 0 0 0 0 0 0 0 6 1962 0 0 0 0 2 1 0 0 0 0 0 0 0 0 0 3 1963 0 0 0 1 3 0 0 0 0 0 0 0 0 0 0 4 1964 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 2 1965 0 2 1 1 3 0 0 1 0 0 0 0 0 0 0 8 1966 0 0 2 2 2 0 0 0 0 0 0 0 0 0 0 6 1967 0 0 0 1 3 0 0 0 0 0 0 0 0 0 0 4 1968 0 0 0 2 1 0 0 1 0 1 0 0 0 0 0 5 1969 0 0 0 1 2 2 2 0 0 0 0 0 0 0 0 7 1970 0 0 1 1 0 1 0 2 0 1 0 0 0 0 0 6 1971 0 0 1 0 0 0 0 1 0 1 0 0 0 0 0 3 1972 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 1973 0 0 0 0 1 2 0 0 0 0 0 0 0 0 0 3 1974 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 2 1975 0 0 0 1 0 1 0 2 2 1 0 0 0 0 0 7 1976 0 0 0 0 0 0 3 2 0 0 0 0 0 0 0 5 1977 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 2 1978 0 0 0 0 0 1 0 1 1 0 0 0 0 0 0 3 1979 0 0 0 1 0 1 1 0 0 0 0 0 0 0 0 3 1980 0 0 1 0 8 1 2 3 0 1 0 0 0 0 0 16 1981 0 0 0 0 1 0 1 5 3 1 1 0 0 0 0 12 1982 0 1 0 0 0 0 0 4 4 0 0 0 0 0 0 9 1983 0 0 0 0 1 0 0 1 4 0 0 0 0 0 0 6 1984 0 0 0 0 0 0 0 0 3 0 0 0 0 0 0 3

Totals 1 13 16 65 71 35 12 27 19 6 1 0 0 0 1 267 1 52 Maritime Reporter/Engineering News