The 50p stamp shows the tanker CAMPEON. The clearest identification is what looks like a crow’s nest in the foremast.

Built under yard no 17 by Astrilleris. Espanoles (AESA) at Puerto Real, Cádiz, Spain for Cia Arrendataria del Monopolio de Petroleas S.A. (CAMPSA), Madrid, Spain.
23 June 1979 launched as the CAMPEON one sister the CAMPONUBLA not any photo gives the last with the orange marking above the bridge windows.
Tonnage 14,863 grt, 22,353 dwt., dim. 166.0 x 24.2m.
One Sulzer 6RND68 diesel engine, 9,900 hp, speed 14.5 knots.
September 1979 delivered to owner, homeport Gran Canaria. IMO No 7711646.

15 August 1980 while it was loading petroleum products, at the Galp Setubal refinery , it suffered a fire followed by a series of explosions, three crew members died and five technicians from the refinery were injured.

2004 Sold to Maritima de Panama SA, Panama and renamed MARGARITA B.
15 June 2006 arrived Chittagong, Bangladesh for scrapping.

Source: http://www.miramarshipindex.nz and internet.
Cuba 2017 50p sg scott?

Built as a double hulled shuttle tanker under yard no 306 by Ast. Espanoles (AESA), Sestao, Spain for Getty Maritime Inc., Monrovia.
09 February 1996 laid down.
15 July 1996 launched under the name ABERDEEN.
Tonnage 47,274 grt, 26,719 nrt, 87,055 dwt., dim. 221.8 x 36.8 x 21m., length bpp.210m.
Powered by 2SA 7 cyl. type 7S60 MC6 engine, 14,314 kw, one shaft, speed 14.5 knots. Two bow-thrusters and one stern thruster.
Crew 34.
Loading capacity 80,500 m³.
18 December 1996 completed. Under Bahama flag and registry, homeport Nassau.

Used in the North Sea.
2018 In service, same name and owner, IMO No 9125736.

Source: http://www.miramarshipindex.nz Internet.
Cuba 2017 35p sg?, scott?

For the 10th Anniversary of the reactivation of the oil refinery Camilo Cienfuegos the refinery was named after Camilo Cienfuegos (a photo van hem also on the stamp on the left) https://en.wikipedia.org/wiki/Camilo_Cienfuegos Cuba issued in 2017 four stamps which shows us the refinery with in the foreground oil tankers used to supply and transport the oil to and from the refinery. The inscription under the stamps translated in English gives for the 15p “coastal tanker”, the 35p “shuttle tanker”, (ABERDEEN), the 50p a “multipurpose tanker” CAMPEON and on the 85p “handy size tanker” WSD 42 111k AFRAMAX tanker design.


The 15p stamp shows us the BORDER TARTAN or BORDER THISTLE both built by the Damen shipyard in Galati, Rumania. It are sisterships which is depict I am not sure.
viewtopic.php?f=2&t=16306#!lightbox[gallery]/0/

BORDER THISTLE: built as a tanker under yard no 1036 for Darwin Shipping Ltd., Jersey.
01 October 2003 laid down.
16 July 2004 launched as BORDER THISTLE.
Tonnage 3,248 grt, 1,273 nrt, 4,988 dwt., dim. 85,32 x 17,00 x 8.95m. Length bpp. 79.9m, draught 6.30m.
Tank capacity 5,211m³.
The empty hull was towed to the Damen yard in Bergum, Netherlands for fitting out under yard no 9355.
Powered by one MAK 8M25c 8 cyl. 2,400 kW, one shaft, speed 12 knots.
26 January 2005 completed, homeport Isle of Man.

04 June 2010 sold to Sociedad Naviera Ultragás Ltd., Santiago, Chile and renamed DON PANCHO
2018 In service same name and owners, IMO No 9287819.

BORDER TARTAN: built as a tanker under yard no 1037 for Darwin Steaming Ltd., Douglas, Isl of Man.
15 October 2003 laid down.
26 August 2004 launched as BORDER TARTAN.
Same details as the BORDER THISTLE.
The empty hull was towed to the Damen yard in Bergum, Netherlands for fitting out under yard No 9356.
02 March 2005 completed.

21 October 2010 sold to Podravina Shipping Inc. Valparaiso, Chile, renamed in DON GONZALO I
2018 Same name and owners IMO No 9287821.

Source: http://www.miramarshipindex.nz and internet.
Cuba 2017 15p sg?, scott?

On April 13-2018 Uruguayan Mail has put into circulation a sheet and the philatelic card Velas Uruguay 2018. The issue will be made within the framework of the International Meeting and Sailing Latin America 2018, which will meet between 10 and 15 April in Punta del Este and Montevideo to frigates, brigantines and schooners of Brazil, Chile, Spain, Venezuela, Colombia, Mexico, Argentina and Uruguay.
These large sailing ships sail together the seas of South America and the Caribbean, for four and a half months. In its route of more than 12 thousand nautical miles, the ships will made calls at 12 ports in Latin America.
Uruguay will be represented by the recently restored school ship Capitán Miranda.

The participating vessels are:
• Cisne Branco Frigate (Brazil) viewtopic.php?f=2&t=10406&p=10905&hilit=cisne#p10905
• Oceanographic vessel Dr. Bernardo Houssay (Argentina) viewtopic.php?f=2&t=8682&p=8696&hilit=bernardo#!lightbox[gallery]/0/
• School ship Juan Sebastián Elcano (Spain) viewtopic.php?f=2&t=8109&p=18334&hilit=juan+sebastian#p18334
• Fragata Libertad (Argentina) viewtopic.php?f=2&t=6826&p=9090&hilit=libertad#p9090
• Gloria school ship (Colombia) viewtopic.php?f=2&t=6147&p=16020&hilit=gloria#p16020
• School ship Cuauhtémoc (Mexico) viewtopic.php?f=2&t=5875
• Simón Bolívar school ship (Venezuela) viewtopic.php?f=2&t=5631&p=16687&hilit=simon+bolivar#p16687
• School ship Esmeralda (Chile) viewtopic.php?f=2&t=8308&p=8304&hilit=esmeralda#p8304
• School ship Capitán Miranda (Uruguay) viewtopic.php?f=2&t=10088
•
Source: Uruguay Mail.
Uruguay 2018 Miniature Sheet sg?, scott?

Thailand issued in 2017 a set of stamps all 3 B for the longboat races in the country.

The stamp shows:
Top left: Two boats racing heading for the finish line in the Nan Province.
Top right: From the Province of Chumphon, the handle of the flag on the finish line.
Bottom left: Preparation before the race in the Nan Province.
Bottom right: The winner boat.

Long Boat-Racing is one of Thailand’s oldest traditions, with the events having been arranged continuously since the Ayutthaya time (approx. 600 years ago). When they were used to enhance the physical and mental strength of the men folk, as the Kingdom was almost continuously, at war with its neighbours of Burma, Lao and Cambodia.
Not any details on this boats I could find.

Source: Internet.
Thailand 2017 3 bath, sg?, scott 2951/54

Vietnam and Thailand jointly issued a set of commemorative stamps in Hanoi and Bangkok on August 5 to celebrate the 40th anniversary of the two countries’ diplomatic relations (August 6, 1976).

The first stamp tells the legend of Hoan Kiem Lake where Le Loi returned his magic sword to the Golden Turle after his forces defeated the Ming Chinese army in 1428; https://en.wikipedia.org/wiki/Ho%C3%A0n ... A%BFm_Lake while the second features Thailand’s folk puppet play, Hun Krabrok, by King Bhumibol Adulyadej. https://en.wikipedia.org/wiki/Hun_krabok

Source: Thai Post.
Thailand 2016 3b sg?, scott 2927a and 2927b one stamp shows a Vietnam dragon boat and the other a scenic decor puppet boat.

The ship EARL OF PEMBROKE stamp is designed after a painting made by Thomas Lundy and shows us the collier EARL OF PEMBROKE leaving Whitby harbour in the North East of England, she was later renamed in HMS BARK ENDEAVOUR see: viewtopic.php?f=2&t=7786&p=19106&hilit=endeavour#p19106
The miniature sheet shows the route Captain Cook made on board the ENDEAVOUR.

Papua New Guinea issued two miniature sheets in 2018 for the 250th anniversary of the first voyage.