If all went well the shipmasters could pocket large fortunes and the seamen earn good wages and sometimes a share of the profits.
But there were many dangers lurking on the seas from unexpected storms which sank vessels to menacing pirates hell bent on grabbing anything they could.
What could the owners do beyond arming the crew and saying their prayers?
Ian Scott: Falkirk’s 'other' wall played important role
In pictures: 28 photos of Falkirk in the 1970s
The secret side of Falkirk’s Aitken’s Brewery revealed at last
Edinburgh Fringe: Beattie family from Polmont take to the stage
Allandale's handsome cottages a reminder of rich industrial heritage
The answer was insurance.
If you wanted to protect your assets then you had to do-it-yourself and that is exactly what happened in Bo’ness.
At the time there were several examples of these schemes which were often called Sea Box societies.
The Aberdeen version, possibly Scotland’s earliest, was established in 1598 and Bo’ness followed in 1634.
Over 120 members – owners, merchants, skippers and seamen – signed up for what quickly became a powerful and influential association.
The sea box itself was just that, a wooden sea chest into which each member put in an agreed percentage of the value of the ship and its cargo, on the understanding that any future losses would be compensated from the box.
One of the chests belonging to the Bo’ness society has survived along with the earliest written records and it is in the excellent museum at Kinneil.
It has two keys to ensure that no individual could empty the box and that at least two ‘key masters’ were present whenever it was opened, which was quarterly.
Over time the amount in the box increased to the point where the society was able to invest in all kinds of interest paying schemes like loans to other businesses or individuals including some of the poverty stricken gentry including the Duke of Hamilton himself.
It was a good time to be an investor because the growth of coal mining, salt making, potteries and iron works meant an increased demand for start up loans and high interest returns.
A growing population needed places to live and the Sea Box Society built houses across the town for centuries: there is an early 20th century tenement in Corbiehall bearing the Sea Box plaque.
An early map of the town from around 1760 shows land ownership dominated by the Duke of Hamilton but with a substantial area called ‘Sea Box Society’.
Of course it was not all about making money.
There were many good causes supported by money from the box including education and religion.
The church in Corbiehall from 1638 (later the Star Cinema) was mostly paid for out of the box as was the minister’s stipend.
There was help for the poor especially if they had suffered from the effects of shipwreck or the actions of brigands.
Widows and orphans of lost sailors were given small pensions and there is a payment recorded in the Sea Box accounts from 1649, ‘to a distressed Seaman robbed by Irish Men of Warre’, and in 1749 a payment, ‘to William McPherson and two others whose tongues were cut out by the Turks of Algiers’.
Today, nearly four centuries after it was founded, the Sea Box Society continues its good work in the community long after the last vessel sailed from the harbour and missing tongues are a distant if painful memory.