Top DoD navigational services to shipping contractors
In the 12 months ending Oct 5, 2026, the Department of Defense obligated $71.1M in net prime contract dollars under NAICS 488330, down 18.0% from $86.7M in the preceding 12 months. 31 prime contractors received positive obligations, and 5 of them accounted for 80% of that spend.
Prime contracts funded by the Department of Defense. Latest 12 months: Oct 6, 2025 to Oct 5, 2026. Source: USAspending.gov.
DoD publishes contract data to USAspending with a 90-day delay, so the most recent months understate DoD activity.
Obligations by fiscal year
Net prime contract obligations by federal fiscal year (October to September).
Top DoD contractors for NAICS 488330
Ranked by positive obligations in the latest 12 months. Share is of all positive obligations in this market.
| # | Contractor | Latest 12 mo | Prior 12 mo | Share | Rank change |
|---|---|---|---|---|---|
| 1 | Alpha Marine Services LLC | $25.6M | $22.8M | 35.9% | ▲ 1 |
| 2 | Moran Towing Corporation | $17.7M | $30.4M | 24.9% | ▼ 1 |
| 3 | P & R Water Taxi LLC | $7.2M | $6.7M | 10.1% | — |
| 4 | Cabras Marine Corporation | $4.8M | $3.7M | 6.8% | ▲ 1 |
| 5 | Mcallister Towing and Transportation Company, Inc. | $2.8M | $749K | 4.0% | ▲ 10 |
| 6 | Foss Maritime Company, LLC. | $1.8M | $1.8M | 2.5% | ▲ 2 |
| 7 | Dunlap Towing Company | $1.7M | $1.5M | 2.4% | ▲ 3 |
| 8 | Virginia Pilot Association | $1.4M | $801K | 2.0% | ▲ 5 |
| 9 | Florida Offshore, Inc. | $1.4M | $2.2M | 1.9% | ▼ 3 |
| 10 | Thames Towboat Co Inc | $1.1M | $5.7M | 1.5% | ▼ 6 |
| 11 | Okinawa Marine Service Co.,ltd. | $966K | $1.8M | 1.4% | ▼ 4 |
| 12 | Bowhead Marine Support Services, LLC | $954K | $0 | 1.3% | New |
| 13 | Servicios Auxiliares DE Puertos SA | $887K | $978K | 1.2% | ▼ 1 |
| 14 | Brusco TUG & Barge, Inc. | $510K | $1.1M | 0.7% | ▼ 3 |
| 15 | EN Bisso Canaveral Inc | $420K | $591K | 0.6% | ▲ 2 |
What changed in the last 12 months
Contractors with the largest change in reported obligations versus the preceding 12 months.
Largest gains
- Alpha Marine Services LLC$22.8M → $25.6M (+$2.8M) · now #1
- Mcallister Towing and Transportation Company, Inc.$749K → $2.8M (+$2.1M) · now #5
- Cabras Marine Corporation$3.7M → $4.8M (+$1.1M) · now #4
Largest declines
- Moran Towing Corporation$30.4M → $17.7M (−$12.7M) · now #2
- Thames Towboat Co Inc$5.7M → $1.1M (−$4.6M) · now #10
- Matson Navigation Company, Inc.$1.8M → $367K (−$1.4M) · now #17
New to this market
6 contractors received their first obligations in this market (since FY2022) during the latest 12 months. The largest:
| Contractor | First obligation | Latest 12 mo |
|---|---|---|
| Bowhead Marine Support Services, LLC | Mar 27, 2026 | $954K |
| Tradewinds Towing LLC | Oct 22, 2025 | $159K |
| Thoma-Sea Marine Constructors, L.L.C. | Oct 17, 2025 | $83K |
| Wynema Pilot Service Corp | Dec 1, 2025 | $57K |
| KB John LLC | Nov 26, 2025 | $20K |
| Gelasakis Societe Anonyme | Mar 18, 2026 | $12K |
Where the money comes from
Funding sub-agencies within the Department of Defense, latest 12 months. The funding organization can differ from the office that runs the requirement.
| Funding sub-agency | Latest 12 mo | Prior 12 mo | Change |
|---|---|---|---|
| Department of the Navy | $68.0M | $81.0M | Down $13.0M (16.1%) |
| Department of the Air Force | $2.3M | $2.2M | Up $124K (5.7%) |
| Department of the Army | $855K | $3.5M | Down $2.7M (75.9%) |
Potential recompetes
Large awards in this market whose current period of performance ends in the next 18 months. Treat these as research leads: options, extensions, and follow-on vehicles often change the timing.
| Award | Incumbent | Obligated | Current end |
|---|---|---|---|
| N3220522C4032 | P & R Water Taxi LLC N103B-G. BAKER-PM4-AWARD CONTRACT N32205-22-C-4038 PEARL HARBOR TUGS TO P&R WATER TAXI, LLC | $29.9M | Oct 30, 2026 |
| N3220524C4021 | Moran Towing Corporation N103 / PM4 / J. SCHWANER / NORFOLK TUGS AWARD | $52.6M | Jan 29, 2027 |
| N3220524C4030 | Moran Towing Corporation N103 / PM4 / J. SCHWANER / PNSY TUGS AWARD | $12.3M | Jan 29, 2027 |
| N3220522C4057 | Cabras Marine Corporation N103/PM4/C. WOODLEY/ GUAM TUG TIME CHARTER | $14.5M | Feb 27, 2027 |
| N6264926FH048 | Cabras Marine Corporation THE REQUIREMENT TO PROVIDE MILITARY SEALIFT COMMAND (MSC) SHIP SUPPORT UNIT (SSU) PORT OPERATIONS GUAM CALL OUT TUG SERVICES TO SUPPORT SHIP MOVEMENTS AND MISCELLANEOUS HARBOR… | $1.5M | Apr 28, 2027 |
| N3220523C4034 | Thames Towboat Co Inc N103B/PM4/S.RICKER/ NEW LONDON TUG REQUIREMENT | $10.7M | Jun 30, 2027 |
Common questions
Who are the top DoD contractors for NAICS 488330?
In the latest 12 months, Alpha Marine Services LLC ($25.6M), Moran Towing Corporation ($17.7M), P & R Water Taxi LLC ($7.2M) received the most DoD obligations for navigational services to shipping.
How concentrated is this market?
The eight largest primes held 88.7% of positive obligations, and Alpha Marine Services LLC alone held 35.9%. 6 contractors won their first obligations in this market during the latest 12 months.
Are any large DoD NAICS 488330 contracts ending soon?
6 of the largest awards in this market reach their current end date in the next 18 months. The first is N3220522C4032 (P & R Water Taxi LLC, $29.9M obligated), ending Oct 30, 2026. An end date is a research lead, not a confirmed recompete: options and extensions often move it.
Related markets
NAICS 488330 across all agencies
DHS · NAICS 488330
$46.6MFigures are net obligations on prime contracts (award types A–D) from USAspending.gov, grouped by funding agency and the NAICS code on each award. Net obligations include deobligations and corrections, so they can differ from positive-obligation totals. See methodology.
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