USS Cohoes (AN-78) Class

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USS Marietta (AN-82) on 19 June 1945
Click on this photograph for links to larger images of this class.

Class:        COHOES (AN-78)
Design:        Navy YN-97/AN-78
Displacement (tons):        650 light, 785 full
Dimensions (feet):        168.5' oa, 146.0' wl x 33.8' e x 10.8 full
Original Armament:        1-3"/50 4-20mm (AN-78, 81, 84-88, 90-91)
Later armaments:        1-3"/50 3-20mmT (1945: AN 79-92); 1-3"/50 3-20mmS (1949: AN-78); 1-3"/50 (1961-68: AN-80, 84, 90);
3-20mmT or none (1958-61: AN 79, 83, 91, 92)
Complement:        46 (1944)
Speed (kts.):        12.3
Propulsion (HP):        1,200
Machinery:        Diesel electric, 1 screw

Construction:

AN	Name	Ord.	Builder	Keel	Launch	Commiss.
78	COHOES	31 Jul 43	Commercial IW	15 Jun 44	29 Nov 44	23 Mar 45
79	ETLAH	31 Jul 43	Commercial IW	30 Jun 44	16 Dec 44	16 Apr 45
80	SUNCOCK	31 Jul 43	Commercial IW	30 Nov 44	16 Feb 45	5 May 45
81	MANAYUNK	31 Jul 43	Commercial IW	18 Dec 44	30 Mar 45	25 May 45
82	MARIETTA	31 Jul 43	Commercial IW	17 Feb 45	27 Apr 45	22 Jun 45
83	NAHANT	31 Jul 43	Commercial IW	31 Mar 45	30 Jun 45	24 Aug 45
--	YN 103-108	31 Jul 43	Commercial IW	--	--	--
84	NAUBUC	4 Sep 43	Marine Iron & SB	31 Dec 43	15 Apr 44	15 Mar 45
85	ONEOTA	4 Sep 43	Marine Iron & SB	9 Feb 44	27 May 44	12 Mar 45
86	PASSACONAWAY	4 Sep 43	Marine Iron & SB	15 Apr 44	30 Jun 44	27 Apr 45
--	YN-112	4 Sep 43	Marine Iron & SB	--	--	--
87	PASSAIC	4 Sep 43	Leathem D. Smith SB	25 Apr 44	29 Jun 44	6 Mar 45
88	SHAKAMAXON	4 Sep 43	Leathem D. Smith SB	30 Jun 44	9 Sep 44	6 Apr 45
89	TONAWANDA	4 Sep 43	Leathem D. Smith SB	12 Sep 44	14 Nov 44	9 May 45
--	YN 116-118	4 Sep 43	Leathem D. Smith SB	--	--	--
90	TUNXIS	4 Sep 43	Zenith Dredge	2 May 44	18 Aug 44	28 Mar 45
91	WAXSAW	4 Sep 43	Zenith Dredge	31 May 44	15 Sep 44	6 May 45
92	YAZOO	4 Sep 43	Zenith Dredge	6 Jul 44	18 Oct 44	31 May 45
--	YN-122	4 Sep 43	Zenith Dredge	--	--	--
--	YN 123-126	30 Sep 43	John H. Mathis	--	--	--
--	YN 127-132	--	Not ordered	--	--	--

Disposition:

AN	Name	Decomm.	Strike	Disposal	Fate	MA Sale
78	COHOES	30 Jun 72	30 Jun 72	21 Feb 73	Sold	--
79	ETLAH	31 May 60	1 Jul 63	1 Jul 63	MA/R	--
80	SUNCOCK	12 Jun 47	1 Sep 62	1 Sep 62	MA/R	--
81	MANAYUNK	19 Jul 46	1 Sep 62	1 Sep 62	MA/R	8 Dec 71
82	MARIETTA	21 Dec 59	1 Sep 76	1 Feb 62	Trf.	--
83	NAHANT	30 Sep 68	1 Oct 68	15 Oct 68	Trf.	--
--	YN 103-108	--	--	2 Oct 43	Canc.	--
84	NAUBUC	6 Sep 46	1 Feb 75	21 Aug 75	Sold	--
85	ONEOTA	6 Feb 47	1 Jul 63	1 Jul 63	MA/R	22 Jan 76
86	PASSACONAWAY	8 Apr 47	1 Jul 63	1 Jul 63	MA/R	29 Sep 76
--	YN-112	--	--	23 Oct 43	Canc.	--
87	PASSAIC	22 Oct 47	1 Jul 63	1 Jul 63	MA/R	29 Sep 76
88	SHAKAMAXON	21 Apr 47	1 Jul 63	1 Jul 63	MA/R	--
89	TONAWANDA	18 Dec 59	15 Apr 77	13 May 60	Trf.	--
--	YN 116-118	--	--	23 Oct 43	Canc.	--
90	TUNXIS	20 Jul 55	1 Sep 76	1 Aug 63	Trf.	--
91	WAXSAW	23 Mar 60	1 Sep 76	1 Aug 63	Trf.	--
92	YAZOO	28 Aug 62	1 Jul 63	1 Jul 63	MA/R	21 Nov 74
--	YN-122	--	--	23 Oct 43	Canc.	--
--	YN 123-126	--	--	23 Oct 43	Canc.	--
--	YN 127-132	--	--	2 Oct 43	Canc.	--

Class Notes:
FY 1944. On 5 Apr 43 VCNO directed the District Craft Development Board (DCDB) to determine the requirements during 1943 and 1944 for fleet service craft for the naval districts, for advanced bases, and for lend lease. On 28 Apr 43 the Board recommended the construction of 256 fleet service craft to fill these requirements, including 36 small steel-hulled net tenders (YN). Contracts were awarded for 30 of these between 31 Jul 43 and 30 Sep 43. On 2 Oct 43 the DCDB recommended the cancellation of 21 of these 36 vessels because the number authorized was "in excess of known requirements." This excess was due in part to the changed strategic situation since April 1943 and in part to the use of pontoon barges in lieu of net tenders in sheltered harbors. The Board also recommended that of the 21 to be cancelled the maximum possible number be taken from shipyards on the West Coast. As a result the last six vessels of the class were never ordered and on 23 Oct 43 contracts for 15 units were cancelled.

These ships were a product improvement of the YN-1 class, being of about the same size but with more powerful main propulsion diesels and the 3" gun relocated aft. Initially the class had four single 20mm guns, including one on a platform between the bridge and stack that had originally been designed to carry a rangefinder. This arrangement was not changed in late 1944, when a similar arrangement was found to be unsatisfactory on the AN-38 class, but on 28 Apr 45 CNO directed the replacement of the ships' four 20mm single mounts with three twin mounts, which permitted the removal of the former rangefinder platform. The last units of the class were commissioned with this modified configuration and Navy records indicate that most of the earlier units were similarly modified in 1945.

Ship Notes:

AN	Name	Notes
78	COHOES	Ex YN-97 20 Jan 44. In USN reserve 1947-62. To NDRF 3 Apr 62. Stk. and to MA 1 Jul 63, from MA 1 Feb 67 and reinstated 1 Mar 67. To ANL-78 1 Jan 69, served in Vietnam. Merc. GLACIER.
79	ETLAH	Ex YN-98 20 Jan 44. In USN reserve 1946-51 (decomm. Apr 47, recomm. 10 Aug 51) and 1960-62. To NDRF 27 Mar 62. From MA to Navy 30 Aug 76, sold 29 Sep 76 to Dominican Republic as CAMBIASO. Hulked 1994.
80	SUNCOCK	Ex YN-99 20 Jan 44. In USN reserve 1946-61. To NDRF 10 Aug 61. From NDRF 25 Aug 64 and returned by MA to Navy 11 Sep 64. Transferred by Navy to Bureau of Mines 1 Jul 65 as GRASS VALLEY. Returned 18 Jun 68, sold 28 Jul 71.
81	MANAYUNK	Ex YN-100 20 Jan 44. In USN reserve 1946-61. To NDRF 20 Jun 61. To buyer 3 Jan 72. Merc. HERON.
82	MARIETTA	Ex YN-101 20 Jan 44. In USN reserve 1946-51. To Venezuela 1962 as PUERTO SANTO. Sold to Venezuela 30 Dec 77. Deleted 1989.
83	NAHANT	Ex YN-102 20 Jan 44. In USN reserve 1946-51. Transferred to Uruguay 1968 as HURACAN. Deleted 1994.
--	YN 103-108	Cancelled. May have been withdrawn from the Commercial IW contract and not reordered before the program was curtailed.
84	NAUBUC	Ex YN-109 20 Jan 44. In USN reserve 1946-61. To NDRF 11 May 61. Stk. and to MA 1 Sep 62, reinstated 1 Jul 67 and from MA 27 Sep 67. Reclassified YRST-4 1 Apr 68. Sale also reported as 18 Sep 75, possibly delivery date to buyer at Hong Kong.
85	ONEOTA	Ex YN-110 20 Jan 44. In USN reserve 1946-62. To NDRF 8 Nov 62. To buyer 24 Feb 76.
86	PASSACONAWAY	Ex YN-111 20 Jan 44. In USN reserve 1946-62. To NDRF 19 Sep 62. From MA to Navy 30 Aug 76, sold 29 Sep 76 to Dominican Republic as SEPARACION. Deleted 2005.
--	YN-112	Cancelled
87	PASSAIC	Ex YN-113 20 Jan 44. In USN reserve 1947-62. To NDRF 8 Nov 62. From MA to Navy 30 Aug 76, sold 29 Sep 76 to Dominican Republic as CALDERAS. Deleted ca. 2004.
88	SHAKAMAXON	Ex YN-114 20 Jan 44. In USN reserve 1946-62. Loaned by MA to Interior Department 8 Nov 68. Returned 13 Sep 77 in Western Caroline Is., sold same date as merc. HAFA ADAI ("Hello" in Chamorro).
89	TONAWANDA	Ex YN-115 20 Jan 44. In USN reserve 1946-51. To Haiti as JEAN JACQUES DESSALINES. Deleted 1977 and returned to U.S., sold June 1981.
0	YN 116-118	Cancelled
90	TUNXIS	Ex YN-119 20 Jan 44. In USN reserve 1946-51 (decomm. 2 Dec 46, recomm. 18 Mar 52) and 1955-61. To NDRF 21 Jun 61. Stk. and to MA 1 Sep 62, reinstated 12 Mar 63 and from MA 20 Jun 63. Trf. to Venezuela as PUERTO DE NUTRIAS. Deleted 1975, sold to Venezuela 30 Dec 77 for cannibalization.
91	WAXSAW	Ex YN-120 20 Jan 44. In USN reserve 1960-62. To NDRF 27 Mar 62, from NDRF 20 Jun 63. To Venezuela as PUERTO MIRANDA. Deleted 1975, sold to Venezuela 30 Dec 77 for cannibalization.
92	YAZOO	Ex YN-121 20 Jan 44. To NDRF 26 Sep 62. Sale of 13 Jun 74 rescinded 9 Jul 74. To buyer 6 Jan 75.
--	YN-122	Cancelled
--	YN 123-126	Cancelled
--	YN 127-132	Not ordered, cancelled.