USS SENNET Newsletter

April 2025

USS Sennet (SS-408) Newsletter

Sennet's Reunion will be Sept. 3, 4 & 5 in Orlando, FL.
Our reunion will be in held in conjunction with the USSVI National Convention which runs from August 31 to September 06, 2025.   There is information about the USSVI National Convention, events and hotel reservations posted on the USSVI web site at https://subvetconvention.org/

Although The USSVI Convention starts earlier and runs later, Sennet's Reunion is Sept 3, 4 and 5 in their convention facilities and at their host hotel.

  • The reservation form for the host hotel is posted on the USSVI web site at https://subvetconvention.org/   Room rates are $120.00 and $15.00 tax and add ons per night.

  • We will be able to use the USSVI vendor room, their hospitality room and attend the tolling of the boats ceremony.

  • You do not need to pay the $30 USSVI registration fee unless you want to participate in any of the other USSVI scheduled events.

John McMichael (64-68) has generously volunteered to host our reunion.   He is working on a restaurant we can use for our dinner and maybe space for our business meeting.   If you are planning to attend the reunion please notify John.   He needs a head count to organize the dinner.

If you have problems booking your room, have questions and to let John know that you are coming, Contact him at: Cob662@gmail.com or Ph: (682) 309-7871.


U-Boats in World War II
In my last newsletter I wrote about the best and worst torpedoes in World War II.   I limited my discussion to the best and the worst, because you could write books about all the other types of torpedoes.   For example: the Germans had patterns built into some of their torpedoes to make circles or reverse course and zig-zag.   If the torpedo did not hit a ship initially, it would then go to the “pattern program” with the probability that it would hit something in a 50–60 ship convoy.

So the question arose, if there was a best and a worst torpedo in WW II, was there a best and worst type of submarine?   That’s almost an impossible question to answer, because u-boats operating in the Atlantic faced vastly different operating conditions, doctrine and challenges from the conditions submarines faced in the Pacific.   For example: The allies used a very effective convoy system, while the Japanese did not.   Likewise, anti-submarine air patrols were much more effective in the Atlantic.   Bottom line, I could not devise an effective scale to judge the best and worst types of submarines.   But I did uncover some interesting comparisons.   Here are some basics:

The Type VII U-boat was 800 tons, 220 feet long, crew 50, 4 bow/1 stern torpedo tubes, carried 14 torpedoes, 1 88 mm deck gun, range 8,500 nm, surf 17.7 kts, sub 8 kts, test depth 750 ft.

The Type IX U-boat was 1,200 tons, 250 feet long, crew 50-55, 4 bow/2 stern torpedo tubes, carried 22 torpedoes, 1 105 mm deck gun, range 10,500 nm, surf 18-20 kts, sub 6-8 kts, test depth 750 ft.

The Balao class submarine was 2,400 tons, 300 feet long, crew 70-80, 6 bow/4 stern torpedo tubes, 24 torpedoes, 1 5-inch deck gun, range 11,000 nm, surf 21 kts, sub 10 kts, test depth 400 ft.

  • American subs were twice as heavy, longer, faster, carried more torpedos, and had more torpedo tubes than u-boats.   American subs had more room for provisions and even refrigeration, plus they had a small machine shop in the engine room with a metal lathe, drill press and other tools for fabricating parts in an emergency or repairing the sub.   This gave American subs the ability to stay on station longer, a major advantage over German subs.

  • The test depth for German u-boats was almost twice that of other submarines, which made surviving an attack more likely.

  • RADAR – American subs had radar and used it very effectively.   They could “follow” a Japanese ship and do an “end-around” and submerge ahead of the projected track.   The Germans developed radar detection equipment, but never actually had radar on their boats until late in the war. 

  • U-boats' diesels were much more reliable than those in fleet boats.   That said, fleet boats had 4 diesels, and U-boats only had two.

  • U-boats had a smaller surface profile, were harder to spot and could dive faster.

  • Not much difference in sonars and batteries.

  • Torpedoes – we both had problems at first, but ended up pretty much the same.

In Summary:
U-boats sank almost 15 million tons of shipping during the war, but it did not affect the outcome.    American shipyards and industry were able to overcome these losses.

American subs sank about 6 million tons or 56 percent of all Japanese ships.   It changed the course of the war, because the Japanese shipyards couldn’t replace those losses, and their economy was dependent upon imports.

The Germans lost over 700 submarines and 30,000 men out of a strength of 1200 submarines.

The Americans lost only 52 subs and 3500 men out of a strength of about 250 submarines.

Two huge factors that I did not discuss were doctrine and training.   Maybe in the next newsletter.


Donations . . .
Contributions from our generous supporters help make our newsletters, website and reunions possible.   Simply said, they reunite friends.   Make your check payable to: USS Sennet SS-408 Reunion Fund and mail to Ralph Luther.   His address is below in the Ship's Store information.

Ship's Store . . .
Ralph Luther stocks a limited supply of Sennet unique submarine items like:

T-Shirts – Size XXL only - Navy blue shirts with the Sennet logo embroidered above the pocket and a submarine veteran screen print on the back - $22
Hoodies – Size XXL only - Submarine veteran screen printed on back - $30
Ball caps - $14
Ships patches (cloth) - $5
Submarine wife pins - $5

Prices do not include postage.   Contact Ralph Luther by email for availability and total cost.   All revenue goes 100% into the Reunion Fund.   Make checks payable to: USS Sennet SS-408 Reunion Fund and mail to:

USS Sennet SS-408
c/o Ralph Luther
107 Wood Side Dr.
Summerville, SC 29485-9301

Email:   rluther107@gmail.com

Eternal Patrol . . .  Recently we learned of the passing of these shipmates:

LTJG David C. English (1963-1965) departed January 11, 2024.
MM2(SS) Elwood V. "Woody" Seiler (1957-1960) departed March 15, 2025.

EN1(SS) Donald E. Shoesmith (1965-1968) departed December 02, 2024.
EM3(SS) James E. Skillman (1965-1966) departed April 20, 2023.

We will remember our other departed shipmates at our reunion Memorial Service.
Special thanks to Ron & Connie Bycroft (1966-68) who send condolence cards to the families of deceased crew members.

Binnacle List . . .  These shipmates are facing some serious challenges and would like to hear from you.   A simple email, card or phone call means so much to them.   Find out more info about your friends on the Sennet web site page “Binnacle List.”

RM2(SS) Robert J. “Bob” Mullin (1958-1960) has Alzheimer's and lives in a memory care facility in Rutland, VT.   Cards or letters may be sent to his son, and he will share them with Bob.
Robert Mullin
c/o Kevin Mullin
118 Ox Yoke Dr.
Rutland, VT 05701-9301

Green Board,

Stan Pollard

3016 Bayberry Cv.
Wooster, OH 44691

Email: 408.stan@gmail.com
Cell: (330) 749-7151


USS SENNET (SS-408)
All Hands Newsletter




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